def _calcValue(self):
"""
Test case added because `and` was being used instead of bitwise `&`.
>>> from fipy.meshes import Grid1D
>>> mesh = Grid1D(nx = 3)
>>> from fipy.variables.faceVariable import FaceVariable
>>> P = FaceVariable(mesh = mesh, value = (1e-3, 1e+71, 1e-3, 1e-3))
>>> alpha = ExponentialConvectionTerm([1])._alpha(P)
>>> print alpha
[ 0.5 1. 0.5 0.5]
"""
eps = 1e-3
largeValue = 101.0
P = self.P.numericValue
P = numerix.where(abs(P) < eps, eps, P)
alpha = numerix.where(P > largeValue, (P - 1) / P, 0.5)
Pmin = numerix.where(P > largeValue + 1, largeValue + 1, P)
alpha = numerix.where((abs(Pmin) > eps) & (Pmin <= largeValue),
((Pmin - 1) * numerix.exp(Pmin) + 1) /
(Pmin * (numerix.exp(Pmin) - 1)), alpha)
return alpha
def dif_fp(u):
b = -4.
D = (numerix.exp(t1) / t2 *
(numerix.power(s2 * numerix.exp(-s1) * u + numerix.exp(s2 * b),
t2 / s2) - numerix.exp(t2 * b))) / (
s2 * u + numerix.exp(s1 + s2 * b))
return D
def _calcValue_(self, alpha, id1, id2):
cell1 = take(self.var, id1)
cell2 = take(self.var, id2)
delta = cell1 - cell2
eps = 1e-14
value = where(abs(delta) < eps, 1.0 / exp(delta), 0.0)
delta = where(abs(delta) < eps, eps, delta)
value = where((abs(delta) > eps) & (delta < 100), delta / (exp(delta) - 1), value)
value *= exp(cell1)
for bc in self.bcs:
if isinstance(bc, FixedValue):
value[bc.faces.value] = bc._value
return value
def _calcValue_(self, alpha, id1, id2):
cell1 = take(self.var,id1)
cell2 = take(self.var,id2)
delta = cell1 - cell2
eps = 1e-14
value = where(abs(delta) < eps, 1. / exp(delta), 0.)
delta = where(abs(delta) < eps, eps, delta)
value = where((abs(delta) > eps) & (delta < 100),
delta / (exp(delta) - 1), value)
value *= exp(cell1)
for bc in self.bcs:
if isinstance(bc, FixedValue):
value[bc.faces.value] = bc._value
return value
def attenuation_profile(self):
"""
Calculates the attenuation profile for this channel
This returns the cumulative product of attenuation factors in each cell of the domain,
allowing this to be multiplied by a surface value to get the irradiance intensity profile.
"""
if not self.is_setup:
self.logger.warning('Attenuation definition may be incomplete!')
return numerix.cumprod(
numerix.exp(-1 * self.k_var * self.domain.distances))
def buildThetaEquation(phase, theta):
phaseMod = phase + ( phase < thetaSmallValue ) * thetaSmallValue
phaseModSq = phaseMod * phaseMod
expo = epsilon * beta * theta.getGrad().getMag()
expo = (expo < 100.) * (expo - 100.) + 100.
pFunc = 1. + numerix.exp(-expo) * (mu / epsilon - 1.)
phaseFace = phase.getArithmeticFaceValue()
phaseSq = phaseFace * phaseFace
gradMag = theta.getFaceGrad().getMag()
eps = 1. / gamma / 10.
gradMag += (gradMag < eps) * eps
IGamma = (gradMag > 1. / gamma) * (1 / gradMag - gamma) + gamma
diffusionCoeff = phaseSq * (s * IGamma + epsilon**2)
thetaGradDiff = theta.getFaceGrad() - theta.getFaceGradNoMod()
sourceCoeff = (diffusionCoeff * thetaGradDiff).getDivergence()
from fipy.terms.implicitDiffusionTerm import ImplicitDiffusionTerm
return TransientTerm(thetaTransientCoeff * phaseModSq * pFunc) == \
ImplicitDiffusionTerm(diffusionCoeff) \
+ sourceCoeff
def buildThetaEquation(phase, theta):
phaseMod = phase + (phase < thetaSmallValue) * thetaSmallValue
phaseModSq = phaseMod * phaseMod
expo = epsilon * beta * theta.getGrad().getMag()
expo = (expo < 100.) * (expo - 100.) + 100.
pFunc = 1. + numerix.exp(-expo) * (mu / epsilon - 1.)
phaseFace = phase.getArithmeticFaceValue()
phaseSq = phaseFace * phaseFace
gradMag = theta.getFaceGrad().getMag()
eps = 1. / gamma / 10.
gradMag += (gradMag < eps) * eps
IGamma = (gradMag > 1. / gamma) * (1 / gradMag - gamma) + gamma
diffusionCoeff = phaseSq * (s * IGamma + epsilon**2)
thetaGradDiff = theta.getFaceGrad() - theta.getFaceGradNoMod()
sourceCoeff = (diffusionCoeff * thetaGradDiff).getDivergence()
from fipy.terms.implicitDiffusionTerm import ImplicitDiffusionTerm
return TransientTerm(thetaTransientCoeff * phaseModSq * pFunc) == \
ImplicitDiffusionTerm(diffusionCoeff) \
+ sourceCoeff
from fipy.tools import numerix
L = 2.
X0 = -1.
nx = 800
cfl = 0.1
K = 4.
rho = 1.
dx = L / nx
m = Grid1D(nx=nx, dx=dx) + X0
x, = m.cellCenters
q = CellVariable(mesh=m, rank=1, elementshape=(2,))
q[0,:] = numerix.exp(-50 * (x - 0.3)**2) * numerix.cos(20 * (x - 0.3))
q[0, x > 0.3] = 0.
Ax = FaceVariable(mesh=m, rank=3, value=[((0, K), (1 / rho, 0))], elementshape=(1, 2, 2))
eqn = TransientTerm() + CentralDifferenceConvectionTerm(Ax) == 0
if __name__ == '__main__':
from fipy import MatplotlibViewer as Viewer
vi = Viewer((q[0], q[1]))
vi.plot()
for step in range(500):
eqn.solve(q, dt=cfl * dx)
if step % 10 == 0 and __name__ == '__main__':
vi.plot()
def one_fourier (n):
mode = (-2.0/(n*pi))*numerix.sin(n*pi*x)*numerix.exp(-t*(pi**2)*(n**2))
return mode
def hydro_1d_fipy(theta_ini, nx, dx, dt, params, ndays, sensor_loc,
boundary_values_left, boundary_values_right, precip,
evapotra, ele_interp, peat_depth):
def zeta_from_theta(x, b):
return np.log(np.exp(s2 * b) + s2 * np.exp(-s1) * x) / s2
mesh = fp.Grid1D(nx=nx, dx=dx)
ele = ele_interp(mesh.cellCenters.value[0])
b = peat_depth + ele.min() - ele
s1 = params[0]
s2 = params[1]
t1 = params[2]
t2 = params[3]
source = precip[0] - evapotra[0]
theta = fp.CellVariable(name="theta",
mesh=mesh,
value=theta_ini,
hasOld=True)
# Choice of parameterization
# This is the underlying conductivity: K = exp(t1 + t2*zeta). The
# transmissivity is derived from this and written in terms of theta
# This is the underlying storage coeff: S = exp(s1 + s2*zeta)
# S is hidden in change from theta to h
# D = (numerix.exp(t1)/t2 * (numerix.power(s2 * numerix.exp(-s1) * theta + numerix.exp(s2*b), t2/s2) - numerix.exp(t2*b))) * np.power(s2 * (theta + numerix.exp(s1 + s2*b)/s2), -1)
# Boussinesq eq. for theta
eq = fp.TransientTerm() == fp.DiffusionTerm(coeff=(
numerix.exp(t1) / t2 *
(numerix.power(s2 * numerix.exp(-s1) * theta +
numerix.exp(s2 * b), t2 / s2) - numerix.exp(t2 * b))
) * np.power(s2 * (theta + numerix.exp(s1 + s2 * b) / s2), -1)) + source
theta_sol_list = [] # returned quantity
MAX_SWEEPS = 10000
for day in range(ndays):
theta.updateOld()
# BC and Source/sink update
theta_left = boundary_values_left[day] # left BC is always Dirichlet
theta.constrain(theta_left, where=mesh.facesLeft)
if boundary_values_right == None: # Pxx sensors. Neuman BC on the right
theta.faceGrad.constrain(0. * mesh.faceNormals,
where=mesh.facesRight)
else:
theta_right = boundary_values_right[day]
theta.constrain(theta_right, where=mesh.facesRight)
source = precip[day] - evapotra[day]
res = 0.0
for r in range(MAX_SWEEPS):
resOld = res
res = eq.sweep(var=theta, dt=dt)
if abs(res - resOld) < 1e-7:
break # it has reached the solution of the linear system
if r == MAX_SWEEPS:
raise ValueError(
'Solution not converging after maximum number of sweeps')
# Append to list
theta_sol = theta.value
theta_sol_sensors = np.array(
[theta_sol[sl] for sl in sensor_loc[1:]]
) # canal sensor is part of the model; cannot be part of the fitness estimation
theta_sol_list.append(theta_sol_sensors[0])
b_sensors = np.array([b[sl] for sl in sensor_loc[1:]])
zeta_from_theta_sol_sensors = zeta_from_theta(np.array(theta_sol_list),
b_sensors)
# print(zeta_from_theta_sol_sensors)
return zeta_from_theta_sol_sensors
U = 100.0
peclet = (U * L / D)
# This is the syntax needed to specify U
convCoeff = (1.0, )
# intial condition width (standard deviation)
sigma = 0.05 * L
#Defining the variable
c = CellVariable(mesh=mesh, name=r"$c$")
# Setting initial conditions
x = mesh.cellCenters[0]
c.value = 0.0
c.setValue(0.05 * (1.0 / (sigma * numerix.sqrt(2 * numerix.pi))) *
numerix.exp(-0.5 * ((x - 1.0) / (sigma))**2.0))
# defining the equation
# We write three equations: pure convection, pure diffusion and convection-diffusion
# eq = TransientTerm() + VanLeerConvectionTerm(coeff=convCoeff) == 0
# eq = TransientTerm() - DiffusionTerm(coeff=(1/peclet)) == 0
eq = TransientTerm() + VanLeerConvectionTerm(coeff=convCoeff) - DiffusionTerm(
coeff=(1.0 / peclet)) == 0
# The choice of dt and dx in a convection problem is a bit more complicated
dt = 0.001
# We might not want to see the output from every single timestep, so we define a stride parameter
time_stride = 10
timestep = 0
run_time = 2.0
def depositionCoeff(alpha, i0):
expo = numerix.exp(-alpha * etaPrime)
return 2 * i0 * (expo - expo * numerix.exp(etaPrime))
def runSimpleTrenchSystem(faradaysConstant=9.6e4,
gasConstant=8.314,
transferCoefficient=0.5,
rateConstant0=1.76,
rateConstant3=-245e-6,
catalystDiffusion=1e-9,
siteDensity=9.8e-6,
molarVolume=7.1e-6,
charge=2,
metalDiffusion=5.6e-10,
temperature=298.,
overpotential=-0.3,
metalConcentration=250.,
catalystConcentration=5e-3,
catalystCoverage=0.,
currentDensity0=0.26,
currentDensity1=45.,
cellSize=0.1e-7,
trenchDepth=0.5e-6,
aspectRatio=2.,
trenchSpacing=0.6e-6,
boundaryLayerDepth=0.3e-6,
numberOfSteps=5,
displayViewers=True):
cflNumber = 0.2
numberOfCellsInNarrowBand = 10
cellsBelowTrench = 10
yCells = cellsBelowTrench \
+ int((trenchDepth + boundaryLayerDepth) / cellSize)
xCells = int(trenchSpacing / 2 / cellSize)
from fipy.tools import serialComm
mesh = Grid2D(dx=cellSize,
dy=cellSize,
nx=xCells,
ny=yCells,
communicator=serialComm)
narrowBandWidth = numberOfCellsInNarrowBand * cellSize
distanceVar = DistanceVariable(name='distance variable',
mesh=mesh,
value=-1.,
hasOld=1)
bottomHeight = cellsBelowTrench * cellSize
trenchHeight = bottomHeight + trenchDepth
trenchWidth = trenchDepth / aspectRatio
sideWidth = (trenchSpacing - trenchWidth) / 2
x, y = mesh.cellCenters
distanceVar.setValue(1.,
where=(y > trenchHeight) |
((y > bottomHeight) &
(x < xCells * cellSize - sideWidth)))
distanceVar.calcDistanceFunction(order=2)
catalystVar = SurfactantVariable(name="catalyst variable",
value=catalystCoverage,
distanceVar=distanceVar)
bulkCatalystVar = CellVariable(name='bulk catalyst variable',
mesh=mesh,
value=catalystConcentration)
metalVar = CellVariable(name='metal variable',
mesh=mesh,
value=metalConcentration)
expoConstant = -transferCoefficient * faradaysConstant \
/ (gasConstant * temperature)
tmp = currentDensity1 * catalystVar.interfaceVar
exchangeCurrentDensity = currentDensity0 + tmp
expo = numerix.exp(expoConstant * overpotential)
currentDensity = expo * exchangeCurrentDensity * metalVar \
/ metalConcentration
depositionRateVariable = currentDensity * molarVolume \
/ (charge * faradaysConstant)
extensionVelocityVariable = CellVariable(name='extension velocity',
mesh=mesh,
value=depositionRateVariable)
surfactantEquation = AdsorbingSurfactantEquation(
surfactantVar=catalystVar,
distanceVar=distanceVar,
bulkVar=bulkCatalystVar,
rateConstant=rateConstant0 + rateConstant3 * overpotential**3)
advectionEquation = TransientTerm() + AdvectionTerm(
extensionVelocityVariable)
metalEquation = buildMetalIonDiffusionEquation(
ionVar=metalVar,
distanceVar=distanceVar,
depositionRate=depositionRateVariable,
diffusionCoeff=metalDiffusion,
metalIonMolarVolume=molarVolume,
)
metalVar.constrain(metalConcentration, mesh.facesTop)
from surfactantBulkDiffusionEquation import buildSurfactantBulkDiffusionEquation
bulkCatalystEquation = buildSurfactantBulkDiffusionEquation(
bulkVar=bulkCatalystVar,
distanceVar=distanceVar,
surfactantVar=catalystVar,
diffusionCoeff=catalystDiffusion,
rateConstant=rateConstant0 * siteDensity)
bulkCatalystVar.constrain(catalystConcentration, mesh.facesTop)
if displayViewers:
try:
from mayaviSurfactantViewer import MayaviSurfactantViewer
viewer = MayaviSurfactantViewer(distanceVar,
catalystVar.interfaceVar,
zoomFactor=1e6,
datamax=0.5,
datamin=0.0,
smooth=1,
title='catalyst coverage')
except:
viewer = MultiViewer(
viewers=(Viewer(distanceVar, datamin=-1e-9, datamax=1e-9),
Viewer(catalystVar.interfaceVar)))
else:
viewer = None
levelSetUpdateFrequency = int(0.8 * narrowBandWidth \
/ (cellSize * cflNumber * 2))
for step in range(numberOfSteps):
if step > 5 and step % 5 == 0 and viewer is not None:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction(order=2)
extensionVelocityVariable.setValue(depositionRateVariable())
distanceVar.updateOld()
distanceVar.extendVariable(extensionVelocityVariable, order=2)
dt = cflNumber * cellSize / extensionVelocityVariable.max()
advectionEquation.solve(distanceVar, dt=dt)
surfactantEquation.solve(catalystVar, dt=dt)
metalEquation.solve(metalVar, dt=dt)
bulkCatalystEquation.solve(bulkCatalystVar,
dt=dt,
solver=GeneralSolver(tolerance=1e-15,
iterations=2000))
try:
import os
filepath = os.path.splitext(__file__)[0] + '.gz'
print catalystVar.allclose(numerix.loadtxt(filepath), rtol=1e-4)
except:
return 0
def runSimpleTrenchSystem(faradaysConstant=9.6e4,
gasConstant=8.314,
transferCoefficient=0.5,
rateConstant0=1.76,
rateConstant3=-245e-6,
catalystDiffusion=1e-9,
siteDensity=9.8e-6,
molarVolume=7.1e-6,
charge=2,
metalDiffusion=5.6e-10,
temperature=298.,
overpotential=-0.3,
metalConcentration=250.,
catalystConcentration=5e-3,
catalystCoverage=0.,
currentDensity0=0.26,
currentDensity1=45.,
cellSize=0.1e-7,
trenchDepth=0.5e-6,
aspectRatio=2.,
trenchSpacing=0.6e-6,
boundaryLayerDepth=0.3e-6,
numberOfSteps=5,
displayViewers=True):
cflNumber = 0.2
numberOfCellsInNarrowBand = 10
cellsBelowTrench = 10
yCells = cellsBelowTrench \
+ int((trenchDepth + boundaryLayerDepth) / cellSize)
xCells = int(trenchSpacing / 2 / cellSize)
from fipy.tools import serialComm
mesh = Grid2D(dx = cellSize,
dy = cellSize,
nx = xCells,
ny = yCells,
communicator=serialComm)
narrowBandWidth = numberOfCellsInNarrowBand * cellSize
distanceVar = DistanceVariable(
name = 'distance variable',
mesh = mesh,
value = -1.,
hasOld = 1)
bottomHeight = cellsBelowTrench * cellSize
trenchHeight = bottomHeight + trenchDepth
trenchWidth = trenchDepth / aspectRatio
sideWidth = (trenchSpacing - trenchWidth) / 2
x, y = mesh.cellCenters
distanceVar.setValue(1., where=(y > trenchHeight) | ((y > bottomHeight) & (x < xCells * cellSize - sideWidth)))
distanceVar.calcDistanceFunction(order=2)
catalystVar = SurfactantVariable(
name = "catalyst variable",
value = catalystCoverage,
distanceVar = distanceVar)
bulkCatalystVar = CellVariable(
name = 'bulk catalyst variable',
mesh = mesh,
value = catalystConcentration)
metalVar = CellVariable(
name = 'metal variable',
mesh = mesh,
value = metalConcentration)
expoConstant = -transferCoefficient * faradaysConstant / (gasConstant * temperature)
tmp = currentDensity1 * catalystVar.interfaceVar
exchangeCurrentDensity = currentDensity0 + tmp
expo = numerix.exp(expoConstant * overpotential)
currentDensity = expo * exchangeCurrentDensity * metalVar / metalConcentration
depositionRateVariable = currentDensity * molarVolume / (charge * faradaysConstant)
extensionVelocityVariable = CellVariable(
name = 'extension velocity',
mesh = mesh,
value = depositionRateVariable)
surfactantEquation = AdsorbingSurfactantEquation(
surfactantVar = catalystVar,
distanceVar = distanceVar,
bulkVar = bulkCatalystVar,
rateConstant = rateConstant0 + rateConstant3 * overpotential**3)
advectionEquation = TransientTerm() + AdvectionTerm(extensionVelocityVariable)
metalEquation = buildMetalIonDiffusionEquation(
ionVar = metalVar,
distanceVar = distanceVar,
depositionRate = depositionRateVariable,
diffusionCoeff = metalDiffusion,
metalIonMolarVolume = molarVolume,
)
metalVar.constrain(metalConcentration, mesh.facesTop)
from .surfactantBulkDiffusionEquation import buildSurfactantBulkDiffusionEquation
bulkCatalystEquation = buildSurfactantBulkDiffusionEquation(
bulkVar = bulkCatalystVar,
distanceVar = distanceVar,
surfactantVar = catalystVar,
diffusionCoeff = catalystDiffusion,
rateConstant = rateConstant0 * siteDensity
)
bulkCatalystVar.constrain(catalystConcentration, mesh.facesTop)
if displayViewers:
try:
from .mayaviSurfactantViewer import MayaviSurfactantViewer
viewer = MayaviSurfactantViewer(distanceVar, catalystVar.interfaceVar, zoomFactor = 1e6, datamax=0.5, datamin=0.0, smooth = 1, title = 'catalyst coverage')
except:
viewer = MultiViewer(viewers=(
Viewer(distanceVar, datamin=-1e-9, datamax=1e-9),
Viewer(catalystVar.interfaceVar)))
else:
viewer = None
levelSetUpdateFrequency = int(0.8 * narrowBandWidth \
/ (cellSize * cflNumber * 2))
for step in range(numberOfSteps):
if step>5 and step % 5 == 0 and viewer is not None:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction(order=2)
extensionVelocityVariable.setValue(depositionRateVariable())
distanceVar.updateOld()
distanceVar.extendVariable(extensionVelocityVariable, order=2)
dt = cflNumber * cellSize / extensionVelocityVariable.max()
advectionEquation.solve(distanceVar, dt = dt)
surfactantEquation.solve(catalystVar, dt = dt)
metalEquation.solve(metalVar, dt = dt)
bulkCatalystEquation.solve(bulkCatalystVar, dt = dt, solver=GeneralSolver(tolerance=1e-15, iterations=2000))
try:
import os
filepath = os.path.splitext(__file__)[0] + '.gz'
print(catalystVar.allclose(numerix.loadtxt(filepath), rtol = 1e-4))
except:
return 0
def _calcValue(self):
"""
Test case added because `and` was being used instead of bitwise `&`.
>>> from fipy.meshes import Grid1D
>>> mesh = Grid1D(nx = 3)
>>> from fipy.variables.faceVariable import FaceVariable
>>> P = FaceVariable(mesh = mesh, value = (1e-3, 1e+71, 1e-3, 1e-3))
>>> alpha = ExponentialConvectionTerm([1])._alpha(P)
>>> print(alpha)
[ 0.5 1. 0.5 0.5]
"""
eps = 1e-3
largeValue = 101.0
P = self.P.numericValue
P = numerix.where(abs(P) < eps, eps, P)
alpha = numerix.where(P > largeValue, (P - 1) / P, 0.5)
Pmin = numerix.where(P > largeValue + 1, largeValue + 1, P)
alpha = numerix.where((abs(Pmin) > eps) & (Pmin <= largeValue), ((Pmin - 1) * numerix.exp(Pmin) + 1) / (Pmin * (numerix.exp(Pmin) - 1)), alpha)
return alpha
from fipy import Grid1D, CellVariable, Viewer
from fipy.tools import numerix, dump
import numpy
from scipy.special import wofz
# ----------------- Mesh Generation -----------------------
L = 4.0
nx = 100
mesh = Grid1D(nx=nx, Lx=L)
x = mesh.cellCenters[0] # Cell position
plasma_disp_real = CellVariable(name=r"Re$(X(z))$", mesh=mesh)
plasma_disp_imag = CellVariable(name=r"Im$(X(z))$", mesh=mesh)
full_plasma_disp = numpy.array(1j*numerix.sqrt(numerix.pi)\
* numerix.exp(-x**2)*wofz(x))
print full_plasma_disp
plasma_disp_real.setValue(full_plasma_disp.real)
plasma_disp_imag.setValue(full_plasma_disp.imag)
initial_viewer = Viewer((plasma_disp_real, plasma_disp_imag),\
xmin=0.0, legend='best')
raw_input("Pause for Initial Conditions")
def runSimpleTrenchSystem(faradaysConstant=9.6e4,
gasConstant=8.314,
transferCoefficient=0.5,
rateConstant0=1.76,
rateConstant3=-245e-6,
catalystDiffusion=1e-9,
siteDensity=9.8e-6,
molarVolume=7.1e-6,
charge=2,
metalDiffusion=5.6e-10,
temperature=298.,
overpotential=-0.3,
metalConcentration=250.,
catalystConcentration=5e-3,
catalystCoverage=0.,
currentDensity0=0.26,
currentDensity1=45.,
cellSize=0.1e-7,
trenchDepth=0.5e-6,
aspectRatio=2.,
trenchSpacing=0.6e-6,
boundaryLayerDepth=0.3e-6,
numberOfSteps=5,
displayViewers=True):
cflNumber = 0.2
numberOfCellsInNarrowBand = 10
cellsBelowTrench = 10
yCells = cellsBelowTrench \
+ int((trenchDepth + boundaryLayerDepth) / cellSize)
xCells = int(trenchSpacing / 2 / cellSize)
from fipy.meshes.grid2D import Grid2D
mesh = Grid2D(dx = cellSize,
dy = cellSize,
nx = xCells,
ny = yCells)
narrowBandWidth = numberOfCellsInNarrowBand * cellSize
from fipy.models.levelSet.distanceFunction.distanceVariable import \
DistanceVariable
distanceVar = DistanceVariable(
name = 'distance variable',
mesh = mesh,
value = -1,
narrowBandWidth = narrowBandWidth,
hasOld = 1)
bottomHeight = cellsBelowTrench * cellSize
trenchHeight = bottomHeight + trenchDepth
trenchWidth = trenchDepth / aspectRatio
sideWidth = (trenchSpacing - trenchWidth) / 2
x, y = mesh.getCellCenters()[...,0], mesh.getCellCenters()[...,1]
distanceVar.setValue(1, where=(y > trenchHeight) | ((y > bottomHeight) & (x < xCells * cellSize - sideWidth)))
distanceVar.calcDistanceFunction(narrowBandWidth = 1e10)
from fipy.models.levelSet.surfactant.surfactantVariable import \
SurfactantVariable
catalystVar = SurfactantVariable(
name = "catalyst variable",
value = catalystCoverage,
distanceVar = distanceVar)
from fipy.variables.cellVariable import CellVariable
bulkCatalystVar = CellVariable(
name = 'bulk catalyst variable',
mesh = mesh,
value = catalystConcentration)
metalVar = CellVariable(
name = 'metal variable',
mesh = mesh,
value = metalConcentration)
expoConstant = -transferCoefficient * faradaysConstant \
/ (gasConstant * temperature)
tmp = currentDensity1 * catalystVar.getInterfaceVar()
exchangeCurrentDensity = currentDensity0 + tmp
import fipy.tools.numerix as numerix
expo = numerix.exp(expoConstant * overpotential)
currentDensity = expo * exchangeCurrentDensity * metalVar \
/ metalConcentration
depositionRateVariable = currentDensity * molarVolume \
/ (charge * faradaysConstant)
extensionVelocityVariable = CellVariable(
name = 'extension velocity',
mesh = mesh,
value = depositionRateVariable)
from fipy.models.levelSet.surfactant.adsorbingSurfactantEquation \
import AdsorbingSurfactantEquation
surfactantEquation = AdsorbingSurfactantEquation(
surfactantVar = catalystVar,
distanceVar = distanceVar,
bulkVar = bulkCatalystVar,
rateConstant = rateConstant0 + rateConstant3 * overpotential**3)
from fipy.models.levelSet.advection.higherOrderAdvectionEquation \
import buildHigherOrderAdvectionEquation
advectionEquation = buildHigherOrderAdvectionEquation(
advectionCoeff = extensionVelocityVariable)
from fipy.boundaryConditions.fixedValue import FixedValue
from fipy.models.levelSet.electroChem.metalIonDiffusionEquation \
import buildMetalIonDiffusionEquation
metalEquation = buildMetalIonDiffusionEquation(
ionVar = metalVar,
distanceVar = distanceVar,
depositionRate = depositionRateVariable,
diffusionCoeff = metalDiffusion,
metalIonMolarVolume = molarVolume,
)
metalEquationBCs = FixedValue(mesh.getFacesTop(), metalConcentration)
from fipy.models.levelSet.surfactant.surfactantBulkDiffusionEquation \
import buildSurfactantBulkDiffusionEquation
bulkCatalystEquation = buildSurfactantBulkDiffusionEquation(
bulkVar = bulkCatalystVar,
distanceVar = distanceVar,
surfactantVar = catalystVar,
diffusionCoeff = catalystDiffusion,
rateConstant = rateConstant0 * siteDensity
)
catalystBCs = FixedValue(mesh.getFacesTop(), catalystConcentration)
if displayViewers:
try:
from fipy.viewers.mayaviViewer.mayaviSurfactantViewer import MayaviSurfactantViewer
viewers = (MayaviSurfactantViewer(distanceVar, catalystVar.getInterfaceVar(), zoomFactor = 1e6, limits = { 'datamax' : 0.5, 'datamin' : 0.0 }, smooth = 1, title = 'catalyst coverage'),)
except:
from fipy.viewers import make
viewers = (
make(distanceVar, limits = { 'datamin' :-1e-9 , 'datamax' : 1e-9 }),
make(catalystVar.getInterfaceVar()))
else:
viewers = ()
levelSetUpdateFrequency = int(0.8 * narrowBandWidth \
/ (cellSize * cflNumber * 2))
for step in range(numberOfSteps):
if step % 5 == 0:
for viewer in viewers:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction()
extensionVelocityVariable.setValue(depositionRateVariable())
distanceVar.updateOld()
catalystVar.updateOld()
metalVar.updateOld()
bulkCatalystVar.updateOld()
distanceVar.extendVariable(extensionVelocityVariable)
dt = cflNumber * cellSize / numerix.max(extensionVelocityVariable)
advectionEquation.solve(distanceVar, dt = dt)
surfactantEquation.solve(catalystVar, dt = dt)
metalEquation.solve(metalVar, dt = dt,
boundaryConditions = metalEquationBCs)
bulkCatalystEquation.solve(bulkCatalystVar, dt = dt,
boundaryConditions = catalystBCs)
try:
import os
import examples.levelSet.electroChem
filepath = os.path.join(examples.levelSet.electroChem.__path__[0], 'test.gz')
from fipy.tools import dump
from fipy.tools import numerix
print catalystVar.allclose(numerix.array(dump.read(filepath)), rtol = 1e-4)
except:
return 0
name = 'metal variable',
mesh = mesh,
value = bulkMetalConcentration)
bench.stop('variables')
bench.start()
expoConstant = -transferCoefficient * faradaysConstant \
/ (gasConstant * temperature)
tmp = currentDensity1 \
* catalystVar.getInterfaceVar()
exchangeCurrentDensity = currentDensity0 + tmp
expo = numerix.exp(expoConstant * overpotential)
currentDensity = expo * exchangeCurrentDensity * metalVar \
/ bulkMetalConcentration
depositionRateVariable = currentDensity * molarVolume \
/ (charge * faradaysConstant)
extensionVelocityVariable = CellVariable(
name = 'extension velocity',
mesh = mesh,
value = depositionRateVariable)
from fipy.models.levelSet.surfactant.adsorbingSurfactantEquation \
import AdsorbingSurfactantEquation
surfactantEquation = AdsorbingSurfactantEquation(
def runLeveler(kLeveler=0.018,
bulkLevelerConcentration=0.02,
cellSize=0.1e-7,
rateConstant=0.00026,
initialAcceleratorCoverage=0.0,
levelerDiffusionCoefficient=5e-10,
numberOfSteps=400,
displayRate=10,
displayViewers=True):
kLevelerConsumption = 0.0005
aspectRatio = 1.5
faradaysConstant = 9.6485e4
gasConstant = 8.314
acceleratorDiffusionCoefficient = 4e-10
siteDensity = 6.35e-6
atomicVolume = 7.1e-6
charge = 2
metalDiffusionCoefficient = 4e-10
temperature = 298.
overpotential = -0.25
bulkMetalConcentration = 250.
bulkAcceleratorConcentration = 50.0e-3
initialLevelerCoverage = 0.
cflNumber = 0.2
cellsBelowTrench = 10
trenchDepth = 0.4e-6
trenchSpacing = 0.6e-6
boundaryLayerDepth = 98.7e-6
i0Suppressor = 0.3
i0Accelerator = 22.5
alphaSuppressor = 0.5
alphaAccelerator = 0.4
alphaAdsorption = 0.62
m = 4
b = 2.65
A = 0.3
Ba = -40
Bb = 60
Vd = 0.098
Bd = 0.0008
etaPrime = faradaysConstant * overpotential / gasConstant / temperature
mesh = TrenchMesh(cellSize = cellSize,
trenchSpacing = trenchSpacing,
trenchDepth = trenchDepth,
boundaryLayerDepth = boundaryLayerDepth,
aspectRatio = aspectRatio,
angle = numerix.pi * 4. / 180.)
distanceVar = GapFillDistanceVariable(
name = 'distance variable',
mesh = mesh,
value = -1.)
distanceVar.setValue(1., where=mesh.electrolyteMask)
distanceVar.calcDistanceFunction()
levelerVar = SurfactantVariable(
name = "leveler variable",
value = initialLevelerCoverage,
distanceVar = distanceVar)
acceleratorVar = SurfactantVariable(
name = "accelerator variable",
value = initialAcceleratorCoverage,
distanceVar = distanceVar)
bulkAcceleratorVar = CellVariable(name = 'bulk accelerator variable',
mesh = mesh,
value = bulkAcceleratorConcentration)
bulkLevelerVar = CellVariable(
name = 'bulk leveler variable',
mesh = mesh,
value = bulkLevelerConcentration)
metalVar = CellVariable(
name = 'metal variable',
mesh = mesh,
value = bulkMetalConcentration)
def depositionCoeff(alpha, i0):
expo = numerix.exp(-alpha * etaPrime)
return 2 * i0 * (expo - expo * numerix.exp(etaPrime))
coeffSuppressor = depositionCoeff(alphaSuppressor, i0Suppressor)
coeffAccelerator = depositionCoeff(alphaAccelerator, i0Accelerator)
exchangeCurrentDensity = acceleratorVar.interfaceVar * (coeffAccelerator - coeffSuppressor) + coeffSuppressor
currentDensity = metalVar / bulkMetalConcentration * exchangeCurrentDensity
depositionRateVariable = currentDensity * atomicVolume / charge / faradaysConstant
extensionVelocityVariable = CellVariable(
name = 'extension velocity',
mesh = mesh,
value = depositionRateVariable)
kAccelerator = rateConstant * numerix.exp(-alphaAdsorption * etaPrime)
kAcceleratorConsumption = Bd + A / (numerix.exp(Ba * (overpotential + Vd)) + numerix.exp(Bb * (overpotential + Vd)))
q = m * overpotential + b
levelerSurfactantEquation = AdsorbingSurfactantEquation(
levelerVar,
distanceVar = distanceVar,
bulkVar = bulkLevelerVar,
rateConstant = kLeveler,
consumptionCoeff = kLevelerConsumption * depositionRateVariable)
accVar1 = acceleratorVar.interfaceVar
accVar2 = (accVar1 > 0) * accVar1
accConsumptionCoeff = kAcceleratorConsumption * (accVar2**(q - 1))
acceleratorSurfactantEquation = AdsorbingSurfactantEquation(
acceleratorVar,
distanceVar = distanceVar,
bulkVar = bulkAcceleratorVar,
rateConstant = kAccelerator,
otherVar = levelerVar,
otherBulkVar = bulkLevelerVar,
otherRateConstant = kLeveler,
consumptionCoeff = accConsumptionCoeff)
advectionEquation = TransientTerm() + FirstOrderAdvectionTerm(extensionVelocityVariable)
metalEquation = buildMetalIonDiffusionEquation(
ionVar = metalVar,
distanceVar = distanceVar,
depositionRate = depositionRateVariable,
diffusionCoeff = metalDiffusionCoefficient,
metalIonMolarVolume = atomicVolume)
metalVar.constrain(bulkMetalConcentration, mesh.facesTop)
bulkAcceleratorEquation = buildSurfactantBulkDiffusionEquation(
bulkVar = bulkAcceleratorVar,
distanceVar = distanceVar,
surfactantVar = acceleratorVar,
otherSurfactantVar = levelerVar,
diffusionCoeff = acceleratorDiffusionCoefficient,
rateConstant = kAccelerator * siteDensity)
bulkAcceleratorVar.constrain(bulkAcceleratorConcentration, mesh.facesTop)
bulkLevelerEquation = buildSurfactantBulkDiffusionEquation(
bulkVar = bulkLevelerVar,
distanceVar = distanceVar,
surfactantVar = levelerVar,
diffusionCoeff = levelerDiffusionCoefficient,
rateConstant = kLeveler * siteDensity)
bulkLevelerVar.constrain(bulkLevelerConcentration, mesh.facesTop)
eqnTuple = ( (advectionEquation, distanceVar, (), None),
(levelerSurfactantEquation, levelerVar, (), None),
(acceleratorSurfactantEquation, acceleratorVar, (), None),
(metalEquation, metalVar, (), None),
(bulkAcceleratorEquation, bulkAcceleratorVar, (), GeneralSolver()),
(bulkLevelerEquation, bulkLevelerVar, (), GeneralSolver()))
narrowBandWidth = 20 * cellSize
levelSetUpdateFrequency = int(0.7 * narrowBandWidth / cellSize / cflNumber / 2)
totalTime = 0.0
if displayViewers:
try:
raise Exception
from .mayaviSurfactantViewer import MayaviSurfactantViewer
viewers = (
MayaviSurfactantViewer(distanceVar, acceleratorVar.interfaceVar, zoomFactor = 1e6, datamax=0.5, datamin=0.0, smooth = 1, title = 'accelerator coverage'),
MayaviSurfactantViewer(distanceVar, levelerVar.interfaceVar, zoomFactor = 1e6, datamax=0.5, datamin=0.0, smooth = 1, title = 'leveler coverage'))
except:
class PlotVariable(CellVariable):
def __init__(self, var = None, name = ''):
CellVariable.__init__(self, mesh = mesh.fineMesh, name = name)
self.var = self._requires(var)
def _calcValue(self):
return numerix.array(self.var(self.mesh.cellCenters))
viewers = (Viewer(PlotVariable(var=acceleratorVar.interfaceVar)),
Viewer(PlotVariable(var=levelerVar.interfaceVar)))
for step in range(numberOfSteps):
if displayViewers:
if step % displayRate == 0:
for viewer in viewers:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction()
extensionVelocityVariable.setValue(depositionRateVariable)
extOnInt = numerix.where(distanceVar.globalValue > 0,
numerix.where(distanceVar.globalValue < 2 * cellSize,
extensionVelocityVariable.globalValue,
0),
0)
dt = cflNumber * cellSize / extOnInt.max()
distanceVar.extendVariable(extensionVelocityVariable)
for eqn, var, BCs, solver in eqnTuple:
eqn.solve(var, boundaryConditions = BCs, dt = dt, solver=solver)
totalTime += dt
point = ((1.25e-08,), (3.125e-07,))
value = 2.02815779e-08
return abs(float(distanceVar(point, order=1)) - value) < cellSize / 10.0
def runLeveler(kLeveler=0.018,
bulkLevelerConcentration=0.02,
cellSize=0.1e-7,
rateConstant=0.00026,
initialAcceleratorCoverage=0.0,
levelerDiffusionCoefficient=5e-10,
numberOfSteps=400,
displayRate=10,
displayViewers=True):
kLevelerConsumption = 0.0005
aspectRatio = 1.5
faradaysConstant = 9.6485e4
gasConstant = 8.314
acceleratorDiffusionCoefficient = 4e-10
siteDensity = 6.35e-6
atomicVolume = 7.1e-6
charge = 2
metalDiffusionCoefficient = 4e-10
temperature = 298.
overpotential = -0.25
bulkMetalConcentration = 250.
bulkAcceleratorConcentration = 50.0e-3
initialLevelerCoverage = 0.
cflNumber = 0.2
cellsBelowTrench = 10
trenchDepth = 0.4e-6
trenchSpacing = 0.6e-6
boundaryLayerDepth = 98.7e-6
i0Suppressor = 0.3
i0Accelerator = 22.5
alphaSuppressor = 0.5
alphaAccelerator = 0.4
alphaAdsorption = 0.62
m = 4
b = 2.65
A = 0.3
Ba = -40
Bb = 60
Vd = 0.098
Bd = 0.0008
etaPrime = faradaysConstant * overpotential / gasConstant / temperature
mesh = TrenchMesh(cellSize=cellSize,
trenchSpacing=trenchSpacing,
trenchDepth=trenchDepth,
boundaryLayerDepth=boundaryLayerDepth,
aspectRatio=aspectRatio,
angle=numerix.pi * 4. / 180.)
distanceVar = GapFillDistanceVariable(name='distance variable',
mesh=mesh,
value=-1.)
distanceVar.setValue(1., where=mesh.electrolyteMask)
distanceVar.calcDistanceFunction()
levelerVar = SurfactantVariable(name="leveler variable",
value=initialLevelerCoverage,
distanceVar=distanceVar)
acceleratorVar = SurfactantVariable(name="accelerator variable",
value=initialAcceleratorCoverage,
distanceVar=distanceVar)
bulkAcceleratorVar = CellVariable(name='bulk accelerator variable',
mesh=mesh,
value=bulkAcceleratorConcentration)
bulkLevelerVar = CellVariable(name='bulk leveler variable',
mesh=mesh,
value=bulkLevelerConcentration)
metalVar = CellVariable(name='metal variable',
mesh=mesh,
value=bulkMetalConcentration)
def depositionCoeff(alpha, i0):
expo = numerix.exp(-alpha * etaPrime)
return 2 * i0 * (expo - expo * numerix.exp(etaPrime))
coeffSuppressor = depositionCoeff(alphaSuppressor, i0Suppressor)
coeffAccelerator = depositionCoeff(alphaAccelerator, i0Accelerator)
exchangeCurrentDensity = acceleratorVar.interfaceVar * (
coeffAccelerator - coeffSuppressor) + coeffSuppressor
currentDensity = metalVar / bulkMetalConcentration * exchangeCurrentDensity
depositionRateVariable = currentDensity * atomicVolume / charge / faradaysConstant
extensionVelocityVariable = CellVariable(name='extension velocity',
mesh=mesh,
value=depositionRateVariable)
kAccelerator = rateConstant * numerix.exp(-alphaAdsorption * etaPrime)
kAcceleratorConsumption = Bd + A / (numerix.exp(Ba *
(overpotential + Vd)) +
numerix.exp(Bb * (overpotential + Vd)))
q = m * overpotential + b
levelerSurfactantEquation = AdsorbingSurfactantEquation(
levelerVar,
distanceVar=distanceVar,
bulkVar=bulkLevelerVar,
rateConstant=kLeveler,
consumptionCoeff=kLevelerConsumption * depositionRateVariable)
accVar1 = acceleratorVar.interfaceVar
accVar2 = (accVar1 > 0) * accVar1
accConsumptionCoeff = kAcceleratorConsumption * (accVar2**(q - 1))
acceleratorSurfactantEquation = AdsorbingSurfactantEquation(
acceleratorVar,
distanceVar=distanceVar,
bulkVar=bulkAcceleratorVar,
rateConstant=kAccelerator,
otherVar=levelerVar,
otherBulkVar=bulkLevelerVar,
otherRateConstant=kLeveler,
consumptionCoeff=accConsumptionCoeff)
advectionEquation = TransientTerm() + FirstOrderAdvectionTerm(
extensionVelocityVariable)
metalEquation = buildMetalIonDiffusionEquation(
ionVar=metalVar,
distanceVar=distanceVar,
depositionRate=depositionRateVariable,
diffusionCoeff=metalDiffusionCoefficient,
metalIonMolarVolume=atomicVolume)
metalVar.constrain(bulkMetalConcentration, mesh.facesTop)
bulkAcceleratorEquation = buildSurfactantBulkDiffusionEquation(
bulkVar=bulkAcceleratorVar,
distanceVar=distanceVar,
surfactantVar=acceleratorVar,
otherSurfactantVar=levelerVar,
diffusionCoeff=acceleratorDiffusionCoefficient,
rateConstant=kAccelerator * siteDensity)
bulkAcceleratorVar.constrain(bulkAcceleratorConcentration, mesh.facesTop)
bulkLevelerEquation = buildSurfactantBulkDiffusionEquation(
bulkVar=bulkLevelerVar,
distanceVar=distanceVar,
surfactantVar=levelerVar,
diffusionCoeff=levelerDiffusionCoefficient,
rateConstant=kLeveler * siteDensity)
bulkLevelerVar.constrain(bulkLevelerConcentration, mesh.facesTop)
eqnTuple = ((advectionEquation, distanceVar, (),
None), (levelerSurfactantEquation, levelerVar, (), None),
(acceleratorSurfactantEquation, acceleratorVar, (),
None), (metalEquation, metalVar, (), None),
(bulkAcceleratorEquation, bulkAcceleratorVar, (),
GeneralSolver()), (bulkLevelerEquation, bulkLevelerVar, (),
GeneralSolver()))
narrowBandWidth = 20 * cellSize
levelSetUpdateFrequency = int(0.7 * narrowBandWidth / cellSize /
cflNumber / 2)
totalTime = 0.0
if displayViewers:
try:
raise Exception
from mayaviSurfactantViewer import MayaviSurfactantViewer
viewers = (MayaviSurfactantViewer(distanceVar,
acceleratorVar.interfaceVar,
zoomFactor=1e6,
datamax=0.5,
datamin=0.0,
smooth=1,
title='accelerator coverage'),
MayaviSurfactantViewer(distanceVar,
levelerVar.interfaceVar,
zoomFactor=1e6,
datamax=0.5,
datamin=0.0,
smooth=1,
title='leveler coverage'))
except:
class PlotVariable(CellVariable):
def __init__(self, var=None, name=''):
CellVariable.__init__(self, mesh=mesh.fineMesh, name=name)
self.var = self._requires(var)
def _calcValue(self):
return numerix.array(self.var(self.mesh.cellCenters))
viewers = (Viewer(PlotVariable(var=acceleratorVar.interfaceVar)),
Viewer(PlotVariable(var=levelerVar.interfaceVar)))
for step in range(numberOfSteps):
if displayViewers:
if step % displayRate == 0:
for viewer in viewers:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction()
extensionVelocityVariable.setValue(depositionRateVariable)
extOnInt = numerix.where(
distanceVar.globalValue > 0,
numerix.where(distanceVar.globalValue < 2 * cellSize,
extensionVelocityVariable.globalValue, 0), 0)
dt = cflNumber * cellSize / extOnInt.max()
distanceVar.extendVariable(extensionVelocityVariable)
for eqn, var, BCs, solver in eqnTuple:
eqn.solve(var, boundaryConditions=BCs, dt=dt, solver=solver)
totalTime += dt
point = ((1.25e-08, ), (3.125e-07, ))
value = 2.02815779e-08
return abs(float(distanceVar(point, order=1)) - value) < cellSize / 10.0
NthOrderBoundaryCondition(mesh.getFacesRight(), 0, 3),
NthOrderBoundaryCondition(mesh.getFacesTop(), 0, 3),
NthOrderBoundaryCondition(mesh.getFacesBottom(), 0, 3))
if __name__ == '__main__':
import fipy.viewers
viewer = fipy.viewers.make(vars=var,
limits={
'datamin': 0.,
'datamax': 1.0
})
viewer.plot()
dexp = -5
for step in range(steps):
dt = numerix.exp(dexp)
dt = min(100, dt)
dexp += 0.01
var.updateOld()
eqch.solve(var, boundaryConditions=BCs, solver=solver, dt=dt)
if __name__ == '__main__':
viewer.plot()
print 'step', step, 'dt', dt
def _run():
pass
print("mesh loaded")
# We need to define the relevant variables:
a = CellVariable(name=r"a", mesh=mesh, hasOld=1)
exp_a = CellVariable(name=r"exp_a", mesh=mesh, hasOld=1)
mu_AB = CellVariable(name=r"mu_AB", mesh=mesh, hasOld=1)
# We need to introduce the noise
noise = GaussianNoiseVariable(mesh=mesh,
mean=numerix.log(A_RAW),
variance=abs(numerix.log(NOISE_MAGNITUDE))).value
a[:] = noise
if GIBBS == "FH":
dgda = (1 + a) * (numerix.exp(a) / N_A) - (numerix.exp(a) / N_B) * (
1 + numerix.log(1.0 - numerix.exp(a))
) + chi_AB * numerix.exp(a) - 2.0 * chi_AB * numerix.exp(2.0 * a)
elif GIBBS != "FH":
print("Implent more stuff you lazy f**k")
# Define the equations
# evaluating kappa
kappa = (1.0 / 6.0) * chi_AB
# # eqn 1 is the 2nd order transport equation
# eq1 = (TransientTerm(var=x_a)) == DiffusionTerm(coeff = x_a * (1 - x_a), var=mu_AB)
# # eqn 2 is the chemical potential definition
# eq2 = (ImplicitSourceTerm(coeff=1. , var=mu_AB)) == ImplicitSourceTerm(coeff=d2gdx_a2, var=x_a) - d2gdx_a2 * x_a + dgdx_a - DiffusionTerm(coeff=kappa, var=x_a)
def runLeveler(kLeveler=0.018, bulkLevelerConcentration=0.02, cellSize=0.1e-7, rateConstant=0.00026, initialAcceleratorCoverage=0.0, levelerDiffusionCoefficient=5e-10, numberOfSteps=400, displayRate=10, displayViewers=True):
kLevelerConsumption = 0.0005
aspectRatio = 1.5
faradaysConstant = 9.6485e4
gasConstant = 8.314
acceleratorDiffusionCoefficient = 4e-10
siteDensity = 6.35e-6
atomicVolume = 7.1e-6
charge = 2
metalDiffusionCoefficient = 4e-10
temperature = 298.
overpotential = -0.25
bulkMetalConcentration = 250.
bulkAcceleratorConcentration = 50.0e-3
initialLevelerCoverage = 0.
cflNumber = 0.2
numberOfCellsInNarrowBand = 20
cellsBelowTrench = 10
trenchDepth = 0.4e-6
trenchSpacing = 0.6e-6
boundaryLayerDepth = 98.7e-6
i0Suppressor = 0.3
i0Accelerator = 22.5
alphaSuppressor = 0.5
alphaAccelerator = 0.4
alphaAdsorption = 0.62
m = 4
b = 2.65
A = 0.3
Ba = -40
Bb = 60
Vd = 0.098
Bd = 0.0008
etaPrime = faradaysConstant * overpotential / gasConstant / temperature
from fipy import TrenchMesh
from fipy.tools import numerix
mesh = TrenchMesh(cellSize = cellSize,
trenchSpacing = trenchSpacing,
trenchDepth = trenchDepth,
boundaryLayerDepth = boundaryLayerDepth,
aspectRatio = aspectRatio,
angle = numerix.pi * 4. / 180.,
bowWidth = 0.,
overBumpRadius = 0.,
overBumpWidth = 0.)
narrowBandWidth = numberOfCellsInNarrowBand * cellSize
from fipy.models.levelSet.distanceFunction.distanceVariable import DistanceVariable
distanceVar = DistanceVariable(
name = 'distance variable',
mesh = mesh,
value = -1,
narrowBandWidth = narrowBandWidth)
distanceVar.setValue(1, where=mesh.getElectrolyteMask())
distanceVar.calcDistanceFunction(narrowBandWidth = 1e10)
from fipy.models.levelSet.surfactant.surfactantVariable import SurfactantVariable
levelerVar = SurfactantVariable(
name = "leveler variable",
value = initialLevelerCoverage,
distanceVar = distanceVar)
acceleratorVar = SurfactantVariable(
name = "accelerator variable",
value = initialAcceleratorCoverage,
distanceVar = distanceVar)
from fipy.variables.cellVariable import CellVariable
bulkAcceleratorVar = CellVariable(name = 'bulk accelerator variable',
mesh = mesh,
value = bulkAcceleratorConcentration)
bulkLevelerVar = CellVariable(
name = 'bulk leveler variable',
mesh = mesh,
value = bulkLevelerConcentration)
metalVar = CellVariable(
name = 'metal variable',
mesh = mesh,
value = bulkMetalConcentration)
def depositionCoeff(alpha, i0):
expo = numerix.exp(-alpha * etaPrime)
return 2 * i0 * (expo - expo * numerix.exp(etaPrime))
coeffSuppressor = depositionCoeff(alphaSuppressor, i0Suppressor)
coeffAccelerator = depositionCoeff(alphaAccelerator, i0Accelerator)
exchangeCurrentDensity = acceleratorVar.getInterfaceVar() * (coeffAccelerator - coeffSuppressor) + coeffSuppressor
currentDensity = metalVar / bulkMetalConcentration * exchangeCurrentDensity
depositionRateVariable = currentDensity * atomicVolume / charge / faradaysConstant
extensionVelocityVariable = CellVariable(
name = 'extension velocity',
mesh = mesh,
value = depositionRateVariable)
from fipy.models.levelSet.surfactant.adsorbingSurfactantEquation \
import AdsorbingSurfactantEquation
kAccelerator = rateConstant * numerix.exp(-alphaAdsorption * etaPrime)
kAcceleratorConsumption = Bd + A / (numerix.exp(Ba * (overpotential + Vd)) + numerix.exp(Bb * (overpotential + Vd)))
q = m * overpotential + b
levelerSurfactantEquation = AdsorbingSurfactantEquation(
levelerVar,
distanceVar = distanceVar,
bulkVar = bulkLevelerVar,
rateConstant = kLeveler,
consumptionCoeff = kLevelerConsumption * depositionRateVariable)
accVar1 = acceleratorVar.getInterfaceVar()
accVar2 = (accVar1 > 0) * accVar1
accConsumptionCoeff = kAcceleratorConsumption * (accVar2**(q - 1))
acceleratorSurfactantEquation = AdsorbingSurfactantEquation(
acceleratorVar,
distanceVar = distanceVar,
bulkVar = bulkAcceleratorVar,
rateConstant = kAccelerator,
otherVar = levelerVar,
otherBulkVar = bulkLevelerVar,
otherRateConstant = kLeveler,
consumptionCoeff = accConsumptionCoeff)
from fipy.models.levelSet.advection.higherOrderAdvectionEquation \
import buildHigherOrderAdvectionEquation
advectionEquation = buildHigherOrderAdvectionEquation(
advectionCoeff = extensionVelocityVariable)
from fipy.boundaryConditions.fixedValue import FixedValue
from fipy.models.levelSet.electroChem.metalIonDiffusionEquation \
import buildMetalIonDiffusionEquation
metalEquation = buildMetalIonDiffusionEquation(
ionVar = metalVar,
distanceVar = distanceVar,
depositionRate = depositionRateVariable,
diffusionCoeff = metalDiffusionCoefficient,
metalIonMolarVolume = atomicVolume)
metalEquationBCs = FixedValue(mesh.getTopFaces(), bulkMetalConcentration)
from fipy.models.levelSet.surfactant.surfactantBulkDiffusionEquation \
import buildSurfactantBulkDiffusionEquation
bulkAcceleratorEquation = buildSurfactantBulkDiffusionEquation(
bulkVar = bulkAcceleratorVar,
distanceVar = distanceVar,
surfactantVar = acceleratorVar,
otherSurfactantVar = levelerVar,
diffusionCoeff = acceleratorDiffusionCoefficient,
rateConstant = kAccelerator * siteDensity)
bulkAcceleratorEquationBCs = (FixedValue(
mesh.getTopFaces(),
bulkAcceleratorConcentration),)
bulkLevelerEquation = buildSurfactantBulkDiffusionEquation(
bulkVar = bulkLevelerVar,
distanceVar = distanceVar,
surfactantVar = levelerVar,
diffusionCoeff = levelerDiffusionCoefficient,
rateConstant = kLeveler * siteDensity)
bulkLevelerEquationBCs = (FixedValue(
mesh.getTopFaces(),
bulkLevelerConcentration),)
eqnTuple = ( (advectionEquation, distanceVar, ()),
(levelerSurfactantEquation, levelerVar, ()),
(acceleratorSurfactantEquation, acceleratorVar, ()),
(metalEquation, metalVar, metalEquationBCs),
(bulkAcceleratorEquation, bulkAcceleratorVar, bulkAcceleratorEquationBCs),
(bulkLevelerEquation, bulkLevelerVar, bulkLevelerEquationBCs))
levelSetUpdateFrequency = int(0.7 * narrowBandWidth / cellSize / cflNumber / 2)
totalTime = 0.0
if displayViewers:
from fipy.viewers.mayaviViewer.mayaviSurfactantViewer import MayaviSurfactantViewer
viewers = (
MayaviSurfactantViewer(distanceVar, acceleratorVar.getInterfaceVar(), zoomFactor = 1e6, limits = { 'datamax' : 0.5, 'datamin' : 0.0 }, smooth = 1, title = 'accelerator coverage'),
MayaviSurfactantViewer(distanceVar, levelerVar.getInterfaceVar(), zoomFactor = 1e6, limits = { 'datamax' : 0.5, 'datamin' : 0.0 }, smooth = 1, title = 'leveler coverage'))
for step in range(numberOfSteps):
if displayViewers:
if step % displayRate == 0:
for viewer in viewers:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction(deleteIslands = True)
extensionVelocityVariable.setValue(depositionRateVariable)
extOnInt = numerix.where(distanceVar > 0,
numerix.where(distanceVar < 2 * cellSize,
extensionVelocityVariable,
0),
0)
dt = cflNumber * cellSize / numerix.max(extOnInt)
id = numerix.max(numerix.nonzero(distanceVar._getInterfaceFlag()))
distanceVar.extendVariable(extensionVelocityVariable, deleteIslands = True)
extensionVelocityVariable[mesh.getFineMesh().getNumberOfCells():] = 0.
for eqn, var, BCs in eqnTuple:
var.updateOld()
for eqn, var, BCs in eqnTuple:
eqn.solve(var, boundaryConditions = BCs, dt = dt)
totalTime += dt
try:
testFile = 'testLeveler.gz'
import os
import examples.levelSet.electroChem
from fipy.tools import dump
data = dump.read(os.path.join(examples.levelSet.electroChem.__path__[0], testFile))
N = mesh.getFineMesh().getNumberOfCells()
print numerix.allclose(data[:N], levelerVar[:N], rtol = 1e-3)
except:
return 0
from fipy.tools import numerix
L = 2.
X0 = -1.
nx = 800
cfl = 0.1
K = 4.
rho = 1.
dx = L / nx
m = Grid1D(nx=nx, dx=dx) + X0
x, = m.cellCenters
q = CellVariable(mesh=m, rank=1, elementshape=(2, ))
q[0, :] = numerix.exp(-50 * (x - 0.3)**2) * numerix.cos(20 * (x - 0.3))
q[0, x > 0.3] = 0.
Ax = FaceVariable(mesh=m,
rank=3,
value=[((0, K), (1 / rho, 0))],
elementshape=(1, 2, 2))
eqn = TransientTerm() + CentralDifferenceConvectionTerm(Ax) == 0
if __name__ == '__main__':
from fipy import MatplotlibViewer as Viewer
vi = Viewer((q[0], q[1]))
vi.plot()
for step in range(500):
def depositionCoeff(alpha, i0):
expo = numerix.exp(-alpha * etaPrime)
return 2 * i0 * (expo - expo * numerix.exp(etaPrime))
def runLeveler(kLeveler=0.018,
bulkLevelerConcentration=0.02,
cellSize=0.1e-7,
rateConstant=0.00026,
initialAcceleratorCoverage=0.0,
levelerDiffusionCoefficient=5e-10,
numberOfSteps=400,
displayRate=10,
displayViewers=True):
kLevelerConsumption = 0.0005
aspectRatio = 1.5
faradaysConstant = 9.6485e4
gasConstant = 8.314
acceleratorDiffusionCoefficient = 4e-10
siteDensity = 6.35e-6
atomicVolume = 7.1e-6
charge = 2
metalDiffusionCoefficient = 4e-10
temperature = 298.
overpotential = -0.25
bulkMetalConcentration = 250.
bulkAcceleratorConcentration = 50.0e-3
initialLevelerCoverage = 0.
cflNumber = 0.2
numberOfCellsInNarrowBand = 20
cellsBelowTrench = 10
trenchDepth = 0.4e-6
trenchSpacing = 0.6e-6
boundaryLayerDepth = 98.7e-6
i0Suppressor = 0.3
i0Accelerator = 22.5
alphaSuppressor = 0.5
alphaAccelerator = 0.4
alphaAdsorption = 0.62
m = 4
b = 2.65
A = 0.3
Ba = -40
Bb = 60
Vd = 0.098
Bd = 0.0008
etaPrime = faradaysConstant * overpotential / gasConstant / temperature
from fipy import TrenchMesh
from fipy.tools import numerix
mesh = TrenchMesh(cellSize=cellSize,
trenchSpacing=trenchSpacing,
trenchDepth=trenchDepth,
boundaryLayerDepth=boundaryLayerDepth,
aspectRatio=aspectRatio,
angle=numerix.pi * 4. / 180.,
bowWidth=0.,
overBumpRadius=0.,
overBumpWidth=0.)
narrowBandWidth = numberOfCellsInNarrowBand * cellSize
from fipy.models.levelSet.distanceFunction.distanceVariable import DistanceVariable
distanceVar = DistanceVariable(name='distance variable',
mesh=mesh,
value=-1,
narrowBandWidth=narrowBandWidth)
distanceVar.setValue(1, where=mesh.getElectrolyteMask())
distanceVar.calcDistanceFunction(narrowBandWidth=1e10)
from fipy.models.levelSet.surfactant.surfactantVariable import SurfactantVariable
levelerVar = SurfactantVariable(name="leveler variable",
value=initialLevelerCoverage,
distanceVar=distanceVar)
acceleratorVar = SurfactantVariable(name="accelerator variable",
value=initialAcceleratorCoverage,
distanceVar=distanceVar)
from fipy.variables.cellVariable import CellVariable
bulkAcceleratorVar = CellVariable(name='bulk accelerator variable',
mesh=mesh,
value=bulkAcceleratorConcentration)
bulkLevelerVar = CellVariable(name='bulk leveler variable',
mesh=mesh,
value=bulkLevelerConcentration)
metalVar = CellVariable(name='metal variable',
mesh=mesh,
value=bulkMetalConcentration)
def depositionCoeff(alpha, i0):
expo = numerix.exp(-alpha * etaPrime)
return 2 * i0 * (expo - expo * numerix.exp(etaPrime))
coeffSuppressor = depositionCoeff(alphaSuppressor, i0Suppressor)
coeffAccelerator = depositionCoeff(alphaAccelerator, i0Accelerator)
exchangeCurrentDensity = acceleratorVar.getInterfaceVar() * (
coeffAccelerator - coeffSuppressor) + coeffSuppressor
currentDensity = metalVar / bulkMetalConcentration * exchangeCurrentDensity
depositionRateVariable = currentDensity * atomicVolume / charge / faradaysConstant
extensionVelocityVariable = CellVariable(name='extension velocity',
mesh=mesh,
value=depositionRateVariable)
from fipy.models.levelSet.surfactant.adsorbingSurfactantEquation \
import AdsorbingSurfactantEquation
kAccelerator = rateConstant * numerix.exp(-alphaAdsorption * etaPrime)
kAcceleratorConsumption = Bd + A / (numerix.exp(Ba *
(overpotential + Vd)) +
numerix.exp(Bb * (overpotential + Vd)))
q = m * overpotential + b
levelerSurfactantEquation = AdsorbingSurfactantEquation(
levelerVar,
distanceVar=distanceVar,
bulkVar=bulkLevelerVar,
rateConstant=kLeveler,
consumptionCoeff=kLevelerConsumption * depositionRateVariable)
accVar1 = acceleratorVar.getInterfaceVar()
accVar2 = (accVar1 > 0) * accVar1
accConsumptionCoeff = kAcceleratorConsumption * (accVar2**(q - 1))
acceleratorSurfactantEquation = AdsorbingSurfactantEquation(
acceleratorVar,
distanceVar=distanceVar,
bulkVar=bulkAcceleratorVar,
rateConstant=kAccelerator,
otherVar=levelerVar,
otherBulkVar=bulkLevelerVar,
otherRateConstant=kLeveler,
consumptionCoeff=accConsumptionCoeff)
from fipy.models.levelSet.advection.higherOrderAdvectionEquation \
import buildHigherOrderAdvectionEquation
advectionEquation = buildHigherOrderAdvectionEquation(
advectionCoeff=extensionVelocityVariable)
from fipy.boundaryConditions.fixedValue import FixedValue
from fipy.models.levelSet.electroChem.metalIonDiffusionEquation \
import buildMetalIonDiffusionEquation
metalEquation = buildMetalIonDiffusionEquation(
ionVar=metalVar,
distanceVar=distanceVar,
depositionRate=depositionRateVariable,
diffusionCoeff=metalDiffusionCoefficient,
metalIonMolarVolume=atomicVolume)
metalEquationBCs = FixedValue(mesh.getTopFaces(), bulkMetalConcentration)
from fipy.models.levelSet.surfactant.surfactantBulkDiffusionEquation \
import buildSurfactantBulkDiffusionEquation
bulkAcceleratorEquation = buildSurfactantBulkDiffusionEquation(
bulkVar=bulkAcceleratorVar,
distanceVar=distanceVar,
surfactantVar=acceleratorVar,
otherSurfactantVar=levelerVar,
diffusionCoeff=acceleratorDiffusionCoefficient,
rateConstant=kAccelerator * siteDensity)
bulkAcceleratorEquationBCs = (FixedValue(mesh.getTopFaces(),
bulkAcceleratorConcentration), )
bulkLevelerEquation = buildSurfactantBulkDiffusionEquation(
bulkVar=bulkLevelerVar,
distanceVar=distanceVar,
surfactantVar=levelerVar,
diffusionCoeff=levelerDiffusionCoefficient,
rateConstant=kLeveler * siteDensity)
bulkLevelerEquationBCs = (FixedValue(mesh.getTopFaces(),
bulkLevelerConcentration), )
eqnTuple = ((advectionEquation, distanceVar,
()), (levelerSurfactantEquation, levelerVar,
()), (acceleratorSurfactantEquation, acceleratorVar,
()), (metalEquation, metalVar, metalEquationBCs),
(bulkAcceleratorEquation, bulkAcceleratorVar,
bulkAcceleratorEquationBCs),
(bulkLevelerEquation, bulkLevelerVar, bulkLevelerEquationBCs))
levelSetUpdateFrequency = int(0.7 * narrowBandWidth / cellSize /
cflNumber / 2)
totalTime = 0.0
if displayViewers:
from fipy.viewers.mayaviViewer.mayaviSurfactantViewer import MayaviSurfactantViewer
viewers = (MayaviSurfactantViewer(distanceVar,
acceleratorVar.getInterfaceVar(),
zoomFactor=1e6,
limits={
'datamax': 0.5,
'datamin': 0.0
},
smooth=1,
title='accelerator coverage'),
MayaviSurfactantViewer(distanceVar,
levelerVar.getInterfaceVar(),
zoomFactor=1e6,
limits={
'datamax': 0.5,
'datamin': 0.0
},
smooth=1,
title='leveler coverage'))
for step in range(numberOfSteps):
if displayViewers:
if step % displayRate == 0:
for viewer in viewers:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction(deleteIslands=True)
extensionVelocityVariable.setValue(depositionRateVariable)
extOnInt = numerix.where(
distanceVar > 0,
numerix.where(distanceVar < 2 * cellSize,
extensionVelocityVariable, 0), 0)
dt = cflNumber * cellSize / numerix.max(extOnInt)
id = numerix.max(numerix.nonzero(distanceVar._getInterfaceFlag()))
distanceVar.extendVariable(extensionVelocityVariable,
deleteIslands=True)
extensionVelocityVariable[mesh.getFineMesh().getNumberOfCells():] = 0.
for eqn, var, BCs in eqnTuple:
var.updateOld()
for eqn, var, BCs in eqnTuple:
eqn.solve(var, boundaryConditions=BCs, dt=dt)
totalTime += dt
try:
testFile = 'testLeveler.gz'
import os
import examples.levelSet.electroChem
from fipy.tools import dump
data = dump.read(
os.path.join(examples.levelSet.electroChem.__path__[0], testFile))
N = mesh.getFineMesh().getNumberOfCells()
print numerix.allclose(data[:N], levelerVar[:N], rtol=1e-3)
except:
return 0
metalVar = CellVariable(name='metal variable',
mesh=mesh,
value=bulkMetalConcentration)
bench.stop('variables')
bench.start()
expoConstant = -transferCoefficient * faradaysConstant \
/ (gasConstant * temperature)
tmp = currentDensity1 \
* catalystVar.getInterfaceVar()
exchangeCurrentDensity = currentDensity0 + tmp
expo = numerix.exp(expoConstant * overpotential)
currentDensity = expo * exchangeCurrentDensity * metalVar \
/ bulkMetalConcentration
depositionRateVariable = currentDensity * molarVolume \
/ (charge * faradaysConstant)
extensionVelocityVariable = CellVariable(name='extension velocity',
mesh=mesh,
value=depositionRateVariable)
from fipy.models.levelSet.surfactant.adsorbingSurfactantEquation \
import AdsorbingSurfactantEquation
surfactantEquation = AdsorbingSurfactantEquation(
surfactantVar = catalystVar,
def exp(self):
return self._UnaryOperatorVariable(lambda a: numerix.exp(a))
def runSimpleTrenchSystem(faradaysConstant=9.6e4,
gasConstant=8.314,
transferCoefficient=0.5,
rateConstant0=1.76,
rateConstant3=-245e-6,
catalystDiffusion=1e-9,
siteDensity=9.8e-6,
molarVolume=7.1e-6,
charge=2,
metalDiffusion=5.6e-10,
temperature=298.,
overpotential=-0.3,
metalConcentration=250.,
catalystConcentration=5e-3,
catalystCoverage=0.,
currentDensity0=0.26,
currentDensity1=45.,
cellSize=0.1e-7,
trenchDepth=0.5e-6,
aspectRatio=2.,
trenchSpacing=0.6e-6,
boundaryLayerDepth=0.3e-6,
numberOfSteps=5,
displayViewers=True):
cflNumber = 0.2
numberOfCellsInNarrowBand = 10
cellsBelowTrench = 10
yCells = cellsBelowTrench \
+ int((trenchDepth + boundaryLayerDepth) / cellSize)
xCells = int(trenchSpacing / 2 / cellSize)
from fipy.meshes.grid2D import Grid2D
mesh = Grid2D(dx=cellSize, dy=cellSize, nx=xCells, ny=yCells)
narrowBandWidth = numberOfCellsInNarrowBand * cellSize
from fipy.models.levelSet.distanceFunction.distanceVariable import \
DistanceVariable
distanceVar = DistanceVariable(name='distance variable',
mesh=mesh,
value=-1,
narrowBandWidth=narrowBandWidth,
hasOld=1)
bottomHeight = cellsBelowTrench * cellSize
trenchHeight = bottomHeight + trenchDepth
trenchWidth = trenchDepth / aspectRatio
sideWidth = (trenchSpacing - trenchWidth) / 2
x, y = mesh.getCellCenters()[..., 0], mesh.getCellCenters()[..., 1]
distanceVar.setValue(1,
where=(y > trenchHeight) |
((y > bottomHeight) &
(x < xCells * cellSize - sideWidth)))
distanceVar.calcDistanceFunction(narrowBandWidth=1e10)
from fipy.models.levelSet.surfactant.surfactantVariable import \
SurfactantVariable
catalystVar = SurfactantVariable(name="catalyst variable",
value=catalystCoverage,
distanceVar=distanceVar)
from fipy.variables.cellVariable import CellVariable
bulkCatalystVar = CellVariable(name='bulk catalyst variable',
mesh=mesh,
value=catalystConcentration)
metalVar = CellVariable(name='metal variable',
mesh=mesh,
value=metalConcentration)
expoConstant = -transferCoefficient * faradaysConstant \
/ (gasConstant * temperature)
tmp = currentDensity1 * catalystVar.getInterfaceVar()
exchangeCurrentDensity = currentDensity0 + tmp
import fipy.tools.numerix as numerix
expo = numerix.exp(expoConstant * overpotential)
currentDensity = expo * exchangeCurrentDensity * metalVar \
/ metalConcentration
depositionRateVariable = currentDensity * molarVolume \
/ (charge * faradaysConstant)
extensionVelocityVariable = CellVariable(name='extension velocity',
mesh=mesh,
value=depositionRateVariable)
from fipy.models.levelSet.surfactant.adsorbingSurfactantEquation \
import AdsorbingSurfactantEquation
surfactantEquation = AdsorbingSurfactantEquation(
surfactantVar=catalystVar,
distanceVar=distanceVar,
bulkVar=bulkCatalystVar,
rateConstant=rateConstant0 + rateConstant3 * overpotential**3)
from fipy.models.levelSet.advection.higherOrderAdvectionEquation \
import buildHigherOrderAdvectionEquation
advectionEquation = buildHigherOrderAdvectionEquation(
advectionCoeff=extensionVelocityVariable)
from fipy.boundaryConditions.fixedValue import FixedValue
from fipy.models.levelSet.electroChem.metalIonDiffusionEquation \
import buildMetalIonDiffusionEquation
metalEquation = buildMetalIonDiffusionEquation(
ionVar=metalVar,
distanceVar=distanceVar,
depositionRate=depositionRateVariable,
diffusionCoeff=metalDiffusion,
metalIonMolarVolume=molarVolume,
)
metalEquationBCs = FixedValue(mesh.getFacesTop(), metalConcentration)
from fipy.models.levelSet.surfactant.surfactantBulkDiffusionEquation \
import buildSurfactantBulkDiffusionEquation
bulkCatalystEquation = buildSurfactantBulkDiffusionEquation(
bulkVar=bulkCatalystVar,
distanceVar=distanceVar,
surfactantVar=catalystVar,
diffusionCoeff=catalystDiffusion,
rateConstant=rateConstant0 * siteDensity)
catalystBCs = FixedValue(mesh.getFacesTop(), catalystConcentration)
if displayViewers:
try:
from fipy.viewers.mayaviViewer.mayaviSurfactantViewer import MayaviSurfactantViewer
viewers = (MayaviSurfactantViewer(distanceVar,
catalystVar.getInterfaceVar(),
zoomFactor=1e6,
limits={
'datamax': 0.5,
'datamin': 0.0
},
smooth=1,
title='catalyst coverage'), )
except:
from fipy.viewers import make
viewers = (make(distanceVar,
limits={
'datamin': -1e-9,
'datamax': 1e-9
}), make(catalystVar.getInterfaceVar()))
else:
viewers = ()
levelSetUpdateFrequency = int(0.8 * narrowBandWidth \
/ (cellSize * cflNumber * 2))
for step in range(numberOfSteps):
if step % 5 == 0:
for viewer in viewers:
viewer.plot()
if step % levelSetUpdateFrequency == 0:
distanceVar.calcDistanceFunction()
extensionVelocityVariable.setValue(depositionRateVariable())
distanceVar.updateOld()
catalystVar.updateOld()
metalVar.updateOld()
bulkCatalystVar.updateOld()
distanceVar.extendVariable(extensionVelocityVariable)
dt = cflNumber * cellSize / numerix.max(extensionVelocityVariable)
advectionEquation.solve(distanceVar, dt=dt)
surfactantEquation.solve(catalystVar, dt=dt)
metalEquation.solve(metalVar,
dt=dt,
boundaryConditions=metalEquationBCs)
bulkCatalystEquation.solve(bulkCatalystVar,
dt=dt,
boundaryConditions=catalystBCs)
try:
import os
import examples.levelSet.electroChem
filepath = os.path.join(examples.levelSet.electroChem.__path__[0],
'test.gz')
from fipy.tools import dump
from fipy.tools import numerix
print catalystVar.allclose(numerix.array(dump.read(filepath)),
rtol=1e-4)
except:
return 0
D = 1.0 U = 100.0 peclet = (U*L/D) # This is the syntax needed to specify u_x convCoeff= (1.0,) # intial condition width (standard deviation) sigma = 0.05*L #Defining the variable c = CellVariable(mesh=mesh, name=r"$c$") # Setting initial conditions x = mesh.cellCenters[0] c.value=0.0 c.setValue(0.05*(1.0/(sigma*numerix.sqrt(2*numerix.pi)))*numerix.exp(-0.5*((x-1.0)/(sigma))**2.0)) # defining the equation # We write three equations: pure convection, pure diffusion and convection-diffusion eq = TransientTerm() + VanLeerConvectionTerm(coeff=convCoeff) == 0 # eq = TransientTerm() + ExponentialConvectionTerm(coeff=convCoeff) == 0 # eq = TransientTerm() - DiffusionTerm(coeff=(1/peclet)) == 0 # eq = TransientTerm() + VanLeerConvectionTerm(coeff=convCoeff) - DiffusionTerm(coeff=(1.0/peclet)) == 0 # The choice of dt and dx in a convection problem is a bit more complicated dt = 0.0001 # We might not want to see the output from every single timestep, so we define a stride parameter time_stride = 200 timestep = 0
dmdt = CellVariable(mesh=mesh, value=dmdt_val)
Dval = CellVariable(mesh=mesh, value=D)
# ### Fipy Calculation loop starts
time_per_loop = numerix.zeros(number_of_steps)
loop = numerix.zeros(number_of_steps)
while t_i <= number_of_steps:
start_import = time.time()
print('*************************************************************')
percentage = float(float(t_i) / (float(number_of_steps))) * 100.0
percentage_val[t_i] = percentage
print('Completed = ' + str(percentage) + '%')
print('dexp=' + str(dexp))
#timestep=min(1e-3, numerix.exp(dexp))
timestep = numerix.exp(dexp)
print('timestep=' + str(timestep))
eqI = (TransientTerm() == DiffusionTerm(coeff=Dval) -
ExponentialConvectionTerm(coeff=dmdt))
eqI.solve(var=phi, dt=timestep)
print('Max phi=' + str(max(phi)))
max_val_phi[t_i] = max(phi)
if __name__ == "__main__": #Parameters to be changed are in the seciton below.
viewer.plot(
filename="trial.vtk"
) #It will only save the final vtk file. You can change the name
if not t_i == 0:
filename = str(t_i).zfill(5)
dest_name = './with_axis_0_VTK_files/with_axis_0_img_' + str(
filename
from fipy.boundaryConditions.nthOrderBoundaryCondition import NthOrderBoundaryCondition
BCs = (FixedFlux(mesh.getFacesRight(), 0),
FixedFlux(mesh.getFacesLeft(), 0),
NthOrderBoundaryCondition(mesh.getFacesLeft(), 0, 3),
NthOrderBoundaryCondition(mesh.getFacesRight(), 0, 3),
NthOrderBoundaryCondition(mesh.getFacesTop(), 0, 3),
NthOrderBoundaryCondition(mesh.getFacesBottom(), 0, 3))
if __name__ == '__main__':
import fipy.viewers
viewer = fipy.viewers.make(vars = var, limits = {'datamin': 0., 'datamax': 1.0})
viewer.plot()
dexp=-5
for step in range(steps):
dt = numerix.exp(dexp)
dt = min(100, dt)
dexp += 0.01
var.updateOld()
eqch.solve(var, boundaryConditions = BCs, solver = solver, dt = dt)
if __name__ == '__main__':
viewer.plot()
print 'step',step,'dt',dt
def _run():
pass
nx = 300
dx = 1
dt = 10.
mesh = fp.Grid1D(nx=nx, dx=dx)
s0 = 0.1; s1 = 0.2
t0 = 1.; t1 = 0.01; t2 = 1.1
# IC
hini = 1.
h = fp.CellVariable(name="head", mesh=mesh, value=hini, hasOld=True)
h_implicit_source = fp.CellVariable(name="head_implicit_source", mesh=mesh, value=hini, hasOld=True)
h_convection = fp.CellVariable(name="head_convection", mesh=mesh, value=hini, hasOld=True)
theta = fp.CellVariable(name="theta", mesh=mesh, value=numerix.exp(s0 + s1*h.value), hasOld=True)
T = t0 * numerix.exp(t1 * h**t2)
S = s1 * numerix.exp(s0 + s1 * h) # and S_theta = s1 * theta
D = t0/s1 * numerix.exp(t1* ((numerix.log(theta) -s0)/s1)**t2)/ theta
# Plots
plotOpt = True
if plotOpt:
fig, ax = plt.subplots(2,2)
x = mesh.cellCenters.value[0]
head = np.arange(0,10,0.1)
th = np.exp(s0 + s1*head)
trans = t0 * np.exp(t1 * head**t2)
sto = s1 * np.exp(s0 + s1*head)