def setup(use_petsc=False,
solver_type='classic',
kernel_language='Python',
outdir='./_output'):
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
if kernel_language == 'Fortran':
solver = pyclaw.ClawSolver1D(riemann.vc_advection_1D)
elif kernel_language == 'Python':
solver = pyclaw.ClawSolver1D(
riemann.vc_advection_1D_py.vc_advection_1D)
elif solver_type == 'sharpclaw':
if kernel_language == 'Fortran':
solver = pyclaw.SharpClawSolver1D(riemann.vc_advection_1D)
elif kernel_language == 'Python':
solver = pyclaw.SharpClawSolver1D(
riemann.vc_advection_1D_py.vc_advection_1D)
solver.weno_order = weno_order
else:
raise Exception('Unrecognized value of solver_type.')
solver.kernel_language = kernel_language
solver.limiters = pyclaw.limiters.tvd.MC
solver.bc_lower[0] = pyclaw.BC.custom
solver.user_bc_lower = custom_bc
solver.bc_upper[0] = pyclaw.BC.custom
solver.user_bc_upper = custom_bc
solver.aux_bc_lower[0] = 2
solver.aux_bc_upper[0] = 2
xlower = -100.0
xupper = 100.0
mx = steps
x = pyclaw.Dimension(xlower, xupper, mx, name='x')
domain = pyclaw.Domain(x)
num_aux = 1
num_eqn = 1
state = pyclaw.State(domain, num_eqn, num_aux)
qinit(state)
auxinit(state)
claw = pyclaw.Controller()
claw.outdir = outdir
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.tfinal = 10.0
claw.setplot = setplot
claw.keep_copy = True
# print claw.solution._get_solution_attribute
return claw
def shockbubble(use_petsc=False,outdir='./_output',solver_type='classic'):
"""
Solve the Euler equations of compressible fluid dynamics.
This example involves a bubble of dense gas that is impacted by a shock.
"""
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type=='sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.euler_5wave_2D)
solver.dq_src=dq_Euler_radial
solver.weno_order=5
solver.lim_type=2
else:
solver = pyclaw.ClawSolver2D(riemann.euler_5wave_2D)
solver.dimensional_split = 0
solver.transverse_waves = 2
solver.limiters = [4,4,4,4,2]
solver.step_source=step_Euler_radial
solver.bc_lower[0]=pyclaw.BC.custom
solver.bc_upper[0]=pyclaw.BC.extrap
solver.bc_lower[1]=pyclaw.BC.wall
solver.bc_upper[1]=pyclaw.BC.extrap
#Aux variable in ghost cells doesn't matter
solver.aux_bc_lower[0]=pyclaw.BC.extrap
solver.aux_bc_upper[0]=pyclaw.BC.extrap
solver.aux_bc_lower[1]=pyclaw.BC.extrap
solver.aux_bc_upper[1]=pyclaw.BC.extrap
# Initialize domain
mx=160; my=40
x = pyclaw.Dimension('x',0.0,2.0,mx)
y = pyclaw.Dimension('y',0.0,0.5,my)
domain = pyclaw.Domain([x,y])
num_eqn = 5
num_aux=1
state = pyclaw.State(domain,num_eqn,num_aux)
state.problem_data['gamma']= gamma
state.problem_data['gamma1']= gamma1
qinit(state)
auxinit(state)
solver.user_bc_lower=shockbc
claw = pyclaw.Controller()
claw.tfinal = 0.75
claw.solution = pyclaw.Solution(state,domain)
claw.solver = solver
claw.num_output_times = 10
claw.outdir = outdir
return claw
def setup(use_petsc=False, outdir='./_output', solver_type='classic'):
"""
Example python script for solving the 2d advection equation.
"""
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
solver = pyclaw.ClawSolver2D(riemann.advection_2D)
solver.dimensional_split = 1
solver.limiters = pyclaw.limiters.tvd.vanleer
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.advection_2D)
solver.bc_lower[0] = pyclaw.BC.periodic
solver.bc_upper[0] = pyclaw.BC.periodic
solver.bc_lower[1] = pyclaw.BC.periodic
solver.bc_upper[1] = pyclaw.BC.periodic
solver.cfl_max = 1.0
solver.cfl_desired = 0.9
#===========================================================================
# Initialize domain, then initialize the solution associated to the domain and
# finally initialize aux array
#===========================================================================
# Domain:
mx = 50
my = 50
x = pyclaw.Dimension('x', 0.0, 1.0, mx)
y = pyclaw.Dimension('y', 0.0, 1.0, my)
domain = pyclaw.Domain([x, y])
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
state.problem_data['u'] = 0.5 # Parameters (global auxiliary variables)
state.problem_data['v'] = 1.0
# Initial solution
# ================
qinit(state) # This function is defined above
#===========================================================================
# Set up controller and controller parameters
#===========================================================================
claw = pyclaw.Controller()
claw.tfinal = 2.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(nx=100,
kernel_language='Python',
use_petsc=False,
solver_type='classic',
weno_order=5,
outdir='./_output'):
import numpy as np
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
if kernel_language == 'Fortran':
solver = pyclaw.ClawSolver1D(riemann.advection_1D)
elif kernel_language == 'Python':
solver = pyclaw.ClawSolver1D(riemann.advection_1D_py.advection_1D)
elif solver_type == 'sharpclaw':
if kernel_language == 'Fortran':
solver = pyclaw.SharpClawSolver1D(riemann.advection_1D)
elif kernel_language == 'Python':
solver = pyclaw.SharpClawSolver1D(
riemann.advection_1D_py.advection_1D)
solver.weno_order = weno_order
else:
raise Exception('Unrecognized value of solver_type.')
solver.kernel_language = kernel_language
solver.bc_lower[0] = 2
solver.bc_upper[0] = 2
x = pyclaw.Dimension('x', 0.0, 1.0, nx)
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
state.problem_data['u'] = 1.
grid = state.grid
xc = grid.x.centers
beta = 100
gamma = 0
x0 = 0.75
state.q[0, :] = np.exp(-beta * (xc - x0)**2) * np.cos(gamma * (xc - x0))
claw = pyclaw.Controller()
claw.keep_copy = True
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
if outdir is not None:
claw.outdir = outdir
else:
claw.output_format = None
claw.tfinal = 1.0
return claw
def wcblast(use_petsc=False,
iplot=False,
htmlplot=False,
outdir='./_output',
solver_type='classic'):
"""
Solve the Euler equations of compressible fluid dynamics.
This example involves a pair of interacting shock waves.
The conserved quantities are density, momentum density, and total energy density.
"""
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D()
else:
solver = pyclaw.ClawSolver1D()
from clawpack import riemann
solver.rp = riemann.rp1_euler_with_efix
solver.num_waves = 3
solver.bc_lower[0] = pyclaw.BC.wall
solver.bc_upper[0] = pyclaw.BC.wall
# Initialize domain
mx = 500
x = pyclaw.Dimension('x', 0.0, 1.0, mx)
domain = pyclaw.Domain([x])
num_eqn = 3
state = pyclaw.State(domain, num_eqn)
state.problem_data['gamma'] = gamma
state.problem_data['gamma1'] = gamma1
state.q[0, :] = 1.
state.q[1, :] = 0.
x = state.grid.x.centers
state.q[2, :] = ((x < 0.1) * 1.e3 + (0.1 <= x) * (x < 0.9) * 1.e-2 +
(0.9 <= x) * 1.e2) / gamma1
solver.limiters = 4
claw = pyclaw.Controller()
claw.tfinal = 0.038
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.num_output_times = 10
claw.outdir = outdir
# Solve
status = claw.run()
if htmlplot: pyclaw.plot.html_plot(outdir=outdir)
if iplot: pyclaw.plot.interactive_plot(outdir=outdir)
return claw.solution.q
def setup(use_petsc=0,
kernel_language='Fortran',
outdir='./_output',
solver_type='classic'):
"""
Example python script for solving the 1d Burgers equation.
"""
import numpy as np
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
#===========================================================================
# Setup solver and solver parameters
#===========================================================================
if solver_type == 'sharpclaw':
if kernel_language == 'Python':
solver = pyclaw.SharpClawSolver1D(riemann.burgers_1D_py.burgers_1D)
elif kernel_language == 'Fortran':
solver = pyclaw.SharpClawSolver1D(riemann.burgers_1D)
else:
if kernel_language == 'Python':
solver = pyclaw.ClawSolver1D(riemann.burgers_1D_py.burgers_1D)
elif kernel_language == 'Fortran':
solver = pyclaw.ClawSolver1D(riemann.burgers_1D)
solver.limiters = pyclaw.limiters.tvd.vanleer
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.periodic
solver.bc_upper[0] = pyclaw.BC.periodic
#===========================================================================
# Initialize domain and then initialize the solution associated to the domain
#===========================================================================
x = pyclaw.Dimension('x', 0.0, 1.0, 500)
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
grid = state.grid
xc = grid.x.centers
state.q[0, :] = np.sin(np.pi * 2 * xc) + 0.50
state.problem_data['efix'] = True
#===========================================================================
# Setup controller and controller parameters. Then solve the problem
#===========================================================================
claw = pyclaw.Controller()
claw.tfinal = 0.5
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
return claw
def setup(use_petsc=False,
outdir='./_output',
solver_type='classic',
kernel_language='Python',
disable_output=False):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Python':
rs = riemann.euler_1D_py.euler_hllc_1D
elif kernel_language == 'Fortran':
rs = riemann.euler_hlle_1D
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(rs)
elif solver_type == 'classic':
solver = pyclaw.ClawSolver1D(rs)
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
mx = 800
x = pyclaw.Dimension(-1.0, 1.0, mx, name='x')
domain = pyclaw.Domain([x])
state = pyclaw.State(domain, num_eqn)
state.problem_data['gamma'] = gamma
state.problem_data['gamma1'] = gamma - 1.
x = state.grid.x.centers
rho_l = 1.
rho_r = 1. / 8
p_l = 1.
p_r = 0.1
state.q[density, :] = (x < 0.) * rho_l + (x >= 0.) * rho_r
state.q[momentum, :] = 0.
velocity = state.q[momentum, :] / state.q[density, :]
pressure = (x < 0.) * p_l + (x >= 0.) * p_r
state.q[energy, :] = pressure / (
gamma - 1.) + 0.5 * state.q[density, :] * velocity**2
claw = pyclaw.Controller()
claw.tfinal = 0.4
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.num_output_times = 10
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
if disable_output:
claw.output_format = None
return claw
def setup(kernel_language='Python',
use_petsc=False,
outdir='./_output',
solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
solver = pyclaw.ClawSolver1D(riemann.shallow_1D_py.shallow_fwave_1d)
solver.limiters = pyclaw.limiters.tvd.vanleer
solver.kernel_language = "Python"
solver.fwave = True
solver.num_waves = 2
solver.num_eqn = 2
solver.bc_lower[0] = pyclaw.BC.wall
solver.bc_upper[0] = pyclaw.BC.wall
solver.aux_bc_lower[0] = pyclaw.BC.wall
solver.aux_bc_upper[0] = pyclaw.BC.wall
solver.step_source = stepSource
# solver.dt = 0.00001
x_star = numpy.sqrt(80.0 / 1e-2) - 1.2
xlower = -x_star
xupper = x_star
x = pyclaw.Dimension(xlower, xupper, 500, name='x')
domain = pyclaw.Domain(x)
state = pyclaw.State(domain, 2, 1)
# Gravitational constant
state.problem_data['grav'] = 9.8
state.problem_data['sea_level'] = 0.0
xc = state.grid.x.centers
# state.aux[0, :] = 0.8 * numpy.exp(-xc**2 / 0.2**2) - 1.0
state.aux[0, :] = 1.e-2 * (xc**2) - 80
ze = -((xc)**2) / 10
state.q[0, :] = numpy.where(
ze > -10., 40.e0 * numpy.exp(ze) - state.aux[0, :],
numpy.where(state.aux[0, :] <= 0, -state.aux[0, :], 0.))
state.q[1, :] = 0.0
claw = pyclaw.Controller()
claw.keep_copy = True
claw.tfinal = 8.0
claw.output_style = 1
claw.num_output_times = 25
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.setplot = setplot
claw.write_aux_init = True
if outdir is not None:
claw.outdir = outdir
else:
claw.output_format = None
return claw
def setup(nx=100,
kernel_language='Python',
use_petsc=False,
solver_type='classic',
weno_order=5,
time_integrator='SSP104',
outdir='./_output'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Fortran':
riemann_solver = riemann.advection_1D
elif kernel_language == 'Python':
riemann_solver = riemann.advection_1D_py.advection_1D
if solver_type == 'classic':
solver = pyclaw.ClawSolver1D(riemann_solver)
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann_solver)
solver.weno_order = weno_order
solver.time_integrator = time_integrator
else:
raise Exception('Unrecognized value of solver_type.')
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.periodic
solver.bc_upper[0] = pyclaw.BC.periodic
x = pyclaw.Dimension('x', 0.0, 1.0, nx)
domain = pyclaw.Domain(x)
state = pyclaw.State(domain, solver.num_eqn)
state.problem_data['u'] = 1. # Advection velocity
# Initial data
xc = state.grid.x.centers
beta = 100
gamma = 0
x0 = 0.75
state.q[0, :] = np.exp(-beta * (xc - x0)**2) * np.cos(gamma * (xc - x0))
claw = pyclaw.Controller()
claw.keep_copy = True
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
if outdir is not None:
claw.outdir = outdir
else:
claw.output_format = None
claw.tfinal = 1.0
claw.setplot = setplot
return claw
def advection(kernel_language='Python',iplot=False,htmlplot=False,
use_petsc=False,solver_type='classic', weno_order=5,
outdir='./_output'):
"""
Example python script for solving the 1d advection equation.
"""
import numpy as np
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type=='sharpclaw':
solver = pyclaw.SharpClawSolver1D()
solver.weno_order=weno_order
else:
solver = pyclaw.ClawSolver1D()
solver.kernel_language = kernel_language
from clawpack.riemann import rp_advection
solver.num_waves = rp_advection.num_waves
if solver.kernel_language=='Python':
solver.rp = rp_advection.rp_advection_1d
else:
from clawpack import riemann
solver.rp = riemann.rp1_advection
solver.bc_lower[0] = 2
solver.bc_upper[0] = 2
x = pyclaw.Dimension('x',0.0,1.0,100)
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain,num_eqn)
state.problem_data['u']=1.
grid = state.grid
xc=grid.x.centers
beta=100; gamma=0; x0=0.75
state.q[0,:] = np.exp(-beta * (xc-x0)**2) * np.cos(gamma * (xc - x0))
claw = pyclaw.Controller()
claw.keep_copy = True
claw.solution = pyclaw.Solution(state,domain)
claw.solver = solver
if outdir is not None:
claw.outdir = outdir
else:
claw.output_format = None
claw.tfinal =1.0
status = claw.run()
if htmlplot: pyclaw.plot.html_plot(outdir=outdir)
if iplot: pyclaw.plot.interactive_plot(outdir=outdir)
return claw
def shocktube(kernel_language='Fortran',
solver_type='classic',
use_petsc=False,
outdir='shocktube_output',
output_format='hdf5',
disable_output=False,
mx=10,
my=10,
mz=128,
tfinal=1.0,
num_output_times=10):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
solver = pyclaw.ClawSolver3D(riemann.euler_3D)
solver.dimensional_split = True
solver.limiters = pyclaw.limiters.tvd.MC
solver.cfl_max = 1.0
solver.cfl_desired = 0.80
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver3D(riemann.euler_3D)
else:
raise Exception('Unrecognized solver_type.')
domain = pyclaw.Domain((-1., -1., -1.), (1., 1., 1.), (mx, my, mz))
state = pyclaw.State(domain, num_eqn)
state.problem_data['gamma'] = gamma
grid = state.grid
X, Y, Z = grid.p_centers
pressure = 3. * (Z <= 0) + 1. * (Z > 0)
state.q[density, :, :, :] = 3. * (Z <= 0) + 1. * (Z > 0)
state.q[x_momentum, :, :, :] = 0.
state.q[y_momentum, :, :, :] = 0.
state.q[z_momentum, :, :, :] = 0.
state.q[energy, :, :, :] = pressure / (gamma - 1.)
solver.all_bcs = pyclaw.BC.extrap
claw = pyclaw.Controller()
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.output_format = output_format
claw.keep_copy = True
if disable_output:
claw.output_format = None
claw.tfinal = tfinal
claw.num_output_times = num_output_times
claw.outdir = outdir
return claw
def setup(use_petsc=False,solver_type='classic', outdir='_output', kernel_language='Fortran',
disable_output=False, mx=320, my=80, tfinal=0.6, num_output_times = 10):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type=='sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.euler_5wave_2D)
solver.dq_src = dq_Euler_radial
solver.weno_order = 5
solver.lim_type = 2
else:
solver = pyclaw.ClawSolver2D(riemann.euler_5wave_2D)
solver.step_source = step_Euler_radial
solver.source_split = 1
solver.limiters = [4,4,4,4,2]
solver.cfl_max = 0.5
solver.cfl_desired = 0.45
x = pyclaw.Dimension(0.0,2.0,mx,name='x')
y = pyclaw.Dimension(0.0,0.5,my,name='y')
domain = pyclaw.Domain([x,y])
num_aux=1
state = pyclaw.State(domain,num_eqn,num_aux)
state.problem_data['gamma']= gamma
qinit(state)
auxinit(state)
solver.user_bc_lower = incoming_shock
solver.bc_lower[0]=pyclaw.BC.custom
solver.bc_upper[0]=pyclaw.BC.extrap
solver.bc_lower[1]=pyclaw.BC.wall
solver.bc_upper[1]=pyclaw.BC.extrap
#Aux variable in ghost cells doesn't matter
solver.aux_bc_lower[0]=pyclaw.BC.extrap
solver.aux_bc_upper[0]=pyclaw.BC.extrap
solver.aux_bc_lower[1]=pyclaw.BC.extrap
solver.aux_bc_upper[1]=pyclaw.BC.extrap
claw = pyclaw.Controller()
claw.solution = pyclaw.Solution(state,domain)
claw.solver = solver
claw.keep_copy = True
if disable_output:
claw.output_format = None
claw.tfinal = tfinal
claw.num_output_times = num_output_times
claw.outdir = outdir
claw.setplot = setplot
return claw
def kpp(use_petsc=False,
iplot=False,
htmlplot=False,
outdir='./_output',
solver_type='classic'):
"""
Example python script for solving the 2d KPP equations.
"""
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver2D()
else:
solver = pyclaw.ClawSolver2D()
from clawpack import riemann
solver.rp = riemann.rp2_kpp
solver.num_waves = 1
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
solver.bc_lower[1] = pyclaw.BC.extrap
solver.bc_upper[1] = pyclaw.BC.extrap
# Initialize domain
mx = 200
my = 200
x = pyclaw.Dimension('x', -2.0, 2.0, mx)
y = pyclaw.Dimension('y', -2.0, 2.0, my)
domain = pyclaw.Domain([x, y])
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
qinit(state)
solver.dimensional_split = 1
solver.cfl_max = 1.0
solver.cfl_desired = 0.9
solver.num_waves = 2
solver.limiters = pyclaw.limiters.tvd.minmod
claw = pyclaw.Controller()
claw.tfinal = 1.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.num_output_times = 10
# Solve
status = claw.run()
if htmlplot: pyclaw.plot.html_plot(outdir=outdir)
if iplot: pyclaw.plot.interactive_plot(outdir=outdir)
def setup(use_petsc=False,
iplot=False,
htmlplot=False,
outdir='./_output',
solver_type='sharpclaw',
kernel_language='Fortran'):
"""
Solve the Euler equations of compressible fluid dynamics.
This example involves a shock wave impacting a sinusoidal density field.
"""
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann.euler_with_efix_1D)
solver.time_integrator = 'RK'
solver.a, solver.b, solver.c = a, b, c
solver.cfl_desired = 0.6
solver.cfl_max = 0.7
else:
solver = pyclaw.ClawSolver1D(riemann.euler_with_efix_1D)
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
# Initialize domain
mx = 400
x = pyclaw.Dimension('x', -5.0, 5.0, mx)
domain = pyclaw.Domain([x])
state = pyclaw.State(domain, solver.num_eqn)
state.problem_data['gamma'] = gamma
state.problem_data['gamma1'] = gamma1
xc = state.grid.x.centers
epsilon = 0.2
state.q[0, :] = (xc < -4.) * 3.857143 + (xc >= -4.) * (
1 + epsilon * np.sin(5 * xc))
velocity = (xc < -4.) * 2.629369
state.q[1, :] = velocity * state.q[0, :]
pressure = (xc < -4.) * 10.33333 + (xc >= -4.) * 1.
state.q[2, :] = pressure / gamma1 + 0.5 * state.q[0, :] * velocity**2
claw = pyclaw.Controller()
claw.tfinal = 1.8
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.num_output_times = 10
claw.outdir = outdir
claw.setplot = setplot
return claw
def __init__(self, shape=None, mx=160, my=40, use_petsc=False, **kwargs):
super(PFASSTShockBubble, self).__init__()
if use_petsc:
import clawpack.petclaw as pyclaw
else:
import clawpack.pyclaw as pyclaw
import clawpack.riemann as riemann
solver = pyclaw.SharpClawSolver2D()
solver.dq_src = dq_Euler_radial
solver.weno_order = 5
solver.lim_type = 2
solver.rp = riemann.rp2_euler_5wave
solver.cfl_max = 0.5
solver.cfl_desired = 0.45
solver.num_waves = 5
solver.bc_lower[0] = pyclaw.BC.custom
solver.bc_upper[0] = pyclaw.BC.extrap
solver.bc_lower[1] = pyclaw.BC.wall
solver.bc_upper[1] = pyclaw.BC.extrap
solver.aux_bc_lower[0] = pyclaw.BC.extrap
solver.aux_bc_upper[0] = pyclaw.BC.extrap
solver.aux_bc_lower[1] = pyclaw.BC.extrap
solver.aux_bc_upper[1] = pyclaw.BC.extrap
# initialize domain
x = pyclaw.Dimension('x', 0.0, 2.0, mx)
y = pyclaw.Dimension('y', 0.0, 0.5, my)
domain = pyclaw.Domain([x, y])
state = pyclaw.State(domain, 5, 1)
state.problem_data['gamma'] = gamma
state.problem_data['gamma1'] = gamma1
qinit(state)
auxinit(state)
solver.user_bc_lower = shockbc
solution = pyclaw.Solution(state, domain)
solver.setup(solution)
self.solution = solution
self.solver = solver
self.state = state
self.shape = (5 * mx * my, )
self.size = 5 * mx * my
self.qshape = (5, mx, my)
def setup(use_petsc=0, outdir='./_output', solver_type='classic'):
"""
Example python script for solving 1d traffic model:
$$ q_t + umax( q(1-q) )_x = 0.$$
"""
import numpy as np
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
#===========================================================================
# Setup solver and solver parameters
#===========================================================================
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann.traffic_1D)
else:
solver = pyclaw.ClawSolver1D(riemann.traffic_1D)
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
#===========================================================================
# Initialize domain and then initialize the solution associated to the domain
#===========================================================================
x = pyclaw.Dimension('x', -1.0, 1.0, 500)
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
grid = state.grid
xc = grid.x.centers
state.q[0, :] = 0.75 * (xc < 0) + 0.1 * (xc > 0.)
state.problem_data['efix'] = True
state.problem_data['umax'] = 1.
#===========================================================================
# Setup controller and controller parameters. Then solve the problem
#===========================================================================
claw = pyclaw.Controller()
claw.tfinal = 2.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(kernel_language='Fortran',
solver_type='classic',
use_petsc=False,
outdir='./_output'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Fortran':
solver = pyclaw.ClawSolver1D(riemann.shallow_bathymetry_fwave_1D)
elif kernel_language == 'Python':
solver = pyclaw.ClawSolver1D(riemann.shallow_1D_py.shallow_fwave_1d)
solver.kernel_language = 'Python'
solver.limiters = pyclaw.limiters.tvd.vanleer
solver.fwave = True
solver.num_waves = 2
solver.num_eqn = 2
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
solver.aux_bc_lower[0] = pyclaw.BC.extrap
solver.aux_bc_upper[0] = pyclaw.BC.extrap
xlower = -1.0
xupper = 1.0
x = pyclaw.Dimension(xlower, xupper, 500, name='x')
domain = pyclaw.Domain(x)
state = pyclaw.State(domain, 2, 1)
# Gravitational constant
state.problem_data['grav'] = 9.8
state.problem_data['dry_tolerance'] = 1e-3
state.problem_data['sea_level'] = 0.0
xc = state.grid.x.centers
state.aux[0, :] = 0.8 * numpy.exp(-xc**2 / 0.2**2) - 1.0
state.q[0, :] = 0.1 * numpy.exp(-(xc + 0.4)**2 / 0.2**2) - state.aux[0, :]
state.q[1, :] = 0.0
claw = pyclaw.Controller()
claw.keep_copy = True
claw.tfinal = 1.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.setplot = setplot
claw.write_aux_init = True
if outdir is not None:
claw.outdir = outdir
else:
claw.output_format = None
return claw
def setup(use_petsc=0,
kernel_language='Python',
outdir='./_output',
solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Python':
riemann_solver = adsolver
elif kernel_language == 'Fortran':
riemann_solver = riemann.burgers_1D
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann_solver)
else:
solver = pyclaw.ClawSolver1D(riemann_solver)
solver.limiters = pyclaw.limiters.tvd.vanleer
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.periodic
#solver.user_bc_lower=custom_bc_one
solver.bc_upper[0] = pyclaw.BC.periodic
#solver.user_bc_upper=custom_bc_two
solver.num_waves = 1
solver.num_eqn = 1
x = pyclaw.Dimension(0.0, 1.0, 500, name='x')
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
xc = state.grid.x.centers
state.q[0, :] = np.sin(np.pi * 2 * xc) + 0.50
state.problem_data['efix'] = True
state.problem_data['a'] = 1.0
claw = pyclaw.Controller()
claw.tfinal = 2.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=False,solver_type='classic',kernel_language='Python',outdir='./_output'):
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type=='classic':
if kernel_language == 'Fortran':
solver = pyclaw.ClawSolver1D(riemann.vc_advection_1D)
elif kernel_language=='Python':
solver = pyclaw.ClawSolver1D(riemann.vc_advection_1D_py.vc_advection_1D)
elif solver_type=='sharpclaw':
if kernel_language == 'Fortran':
solver = pyclaw.SharpClawSolver1D(riemann.vc_advection_1D)
elif kernel_language=='Python':
solver = pyclaw.SharpClawSolver1D(riemann.vc_advection_1D_py.vc_advection_1D)
solver.weno_order=weno_order
else: raise Exception('Unrecognized value of solver_type.')
solver.kernel_language = kernel_language
solver.limiters = pyclaw.limiters.tvd.MC
solver.bc_lower[0] = 2
solver.bc_upper[0] = 2
solver.aux_bc_lower[0] = 2
solver.aux_bc_upper[0] = 2
xlower=0.0; xupper=1.0; mx=100
x = pyclaw.Dimension('x',xlower,xupper,mx)
domain = pyclaw.Domain(x)
num_aux=1
num_eqn = 1
state = pyclaw.State(domain,num_eqn,num_aux)
qinit(state)
auxinit(state)
claw = pyclaw.Controller()
claw.outdir = outdir
claw.solution = pyclaw.Solution(state,domain)
claw.solver = solver
claw.tfinal = 1.0
return claw
def vc_advection(use_petsc=False,solver_type='classic',kernel_language='Python',iplot=False,htmlplot=False,outdir='./_output'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type=='sharpclaw':
solver = pyclaw.SharpClawSolver1D()
else:
solver = pyclaw.ClawSolver1D()
from clawpack import riemann
solver.num_waves = riemann.rp_vc_advection.num_waves
solver.kernel_language = kernel_language
if solver.kernel_language=='Python':
solver.rp = riemann.rp_vc_advection.rp_vc_advection_1d
elif solver.kernel_language=='Fortran':
raise NotImplementedError('The 1D variable coefficient advection Riemann solver has not yet been ported.')
solver.limiters = pyclaw.limiters.tvd.MC
solver.bc_lower[0] = 2
solver.bc_upper[0] = 2
solver.aux_bc_lower[0] = 2
solver.aux_bc_upper[0] = 2
xlower=0.0; xupper=1.0; mx=100
x = pyclaw.Dimension('x',xlower,xupper,mx)
domain = pyclaw.Domain(x)
num_aux=1
num_eqn = 1
state = pyclaw.State(domain,num_eqn,num_aux)
qinit(state)
auxinit(state)
claw = pyclaw.Controller()
claw.outdir = outdir
claw.solution = pyclaw.Solution(state,domain)
claw.solver = solver
claw.tfinal = 1.0
status = claw.run()
if htmlplot: pyclaw.plot.html_plot(outdir=outdir)
if iplot: pyclaw.plot.interactive_plot(outdir=outdir)
def setup(use_petsc=False, outdir='./_output', solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
solver = pyclaw.ClawSolver2D(riemann.shallow_roe_with_efix_2D)
solver.limiters = pyclaw.limiters.tvd.MC
solver.dimensional_split = 1
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.shallow_roe_with_efix_2D)
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.wall
solver.bc_lower[1] = pyclaw.BC.extrap
solver.bc_upper[1] = pyclaw.BC.wall
# Domain:
xlower = -2.5
xupper = 2.5
mx = 150
ylower = -2.5
yupper = 2.5
my = 150
x = pyclaw.Dimension('x', xlower, xupper, mx)
y = pyclaw.Dimension('y', ylower, yupper, my)
domain = pyclaw.Domain([x, y])
state = pyclaw.State(domain, solver.num_eqn)
# Gravitational constant
state.problem_data['grav'] = 1.0
qinit(state)
claw = pyclaw.Controller()
claw.tfinal = 2.5
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.num_output_times = 10
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=False, outdir='./_output', solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
solver = pyclaw.ClawSolver2D(riemann.advection_2D)
solver.dimensional_split = 1
solver.limiters = pyclaw.limiters.tvd.vanleer
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.advection_2D)
solver.bc_lower[0] = pyclaw.BC.periodic
solver.bc_upper[0] = pyclaw.BC.periodic
solver.bc_lower[1] = pyclaw.BC.periodic
solver.bc_upper[1] = pyclaw.BC.periodic
solver.cfl_max = 1.0
solver.cfl_desired = 0.9
# Domain:
mx = 50
my = 50
x = pyclaw.Dimension(0.0, 1.0, mx, name='x')
y = pyclaw.Dimension(0.0, 1.0, my, name='y')
domain = pyclaw.Domain([x, y])
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
state.problem_data['u'] = 0.5 # Advection velocity
state.problem_data['v'] = 1.0
qinit(state)
claw = pyclaw.Controller()
claw.tfinal = 2.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=0,
kernel_language='Fortran',
outdir='./_output',
solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Python':
riemann_solver = riemann.burgers_1D_py.burgers_1D
elif kernel_language == 'Fortran':
riemann_solver = riemann.burgers_1D
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann_solver)
else:
solver = pyclaw.ClawSolver1D(riemann_solver)
solver.limiters = pyclaw.limiters.tvd.vanleer
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.custom
solver.user_bc_lower = custom_bc
solver.bc_upper[0] = pyclaw.BC.custom
solver.user_bc_upper = custom_bc
x = pyclaw.Dimension(-100.0, 100.0, steps, name='x')
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
xc = state.grid.x.centers
state.q[0, :] = np.exp(-xc**2)
state.problem_data['efix'] = True
claw = pyclaw.Controller()
claw.tfinal = 10.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=False, outdir='./_output', solver_type='classic'):
"""
Example python script for solving the 2d KPP equations.
"""
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.kpp_2D)
else:
solver = pyclaw.ClawSolver2D(riemann.kpp_2D)
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
solver.bc_lower[1] = pyclaw.BC.extrap
solver.bc_upper[1] = pyclaw.BC.extrap
# Initialize domain
mx = 200
my = 200
x = pyclaw.Dimension('x', -2.0, 2.0, mx)
y = pyclaw.Dimension('y', -2.0, 2.0, my)
domain = pyclaw.Domain([x, y])
state = pyclaw.State(domain, solver.num_eqn)
qinit(state)
solver.dimensional_split = 1
solver.cfl_max = 1.0
solver.cfl_desired = 0.9
solver.limiters = pyclaw.limiters.tvd.minmod
claw = pyclaw.Controller()
claw.tfinal = 1.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.num_output_times = 10
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=0, outdir='./_output', solver_type='classic', weno_order=5, N=1000):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
riemann_solver = riemann.cubic_1D
if solver_type=='sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann_solver)
solver.weno_order = weno_order
else:
solver = pyclaw.ClawSolver1D(riemann_solver)
solver.limiters = pyclaw.limiters.tvd.vanleer
solver.cfl_max = 1.0
solver.cfl_desired = 0.5
solver.kernel_language = 'Fortran'
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
x = pyclaw.Dimension(-1.0, 3.0, N, name='x')
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain, num_eqn)
xc = state.grid.x.centers
qL = 4.0
qR = -2.0
state.q[0,:] = (xc < -0.5) * qL + (xc >= -0.5) * qR
claw = pyclaw.Controller()
claw.tfinal = 0.2
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=False, outdir='./_output', solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver2D(riemann.kpp_2D)
else:
solver = pyclaw.ClawSolver2D(riemann.kpp_2D)
solver.dimensional_split = 1
solver.cfl_max = 1.0
solver.cfl_desired = 0.9
solver.limiters = pyclaw.limiters.tvd.minmod
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
solver.bc_lower[1] = pyclaw.BC.extrap
solver.bc_upper[1] = pyclaw.BC.extrap
# Initialize domain
mx = 200
my = 200
x = pyclaw.Dimension(-2.0, 2.0, mx, name='x')
y = pyclaw.Dimension(-2.0, 2.0, my, name='y')
domain = pyclaw.Domain([x, y])
state = pyclaw.State(domain, solver.num_eqn)
# Initial data
X, Y = state.grid.p_centers
r = np.sqrt(X**2 + Y**2)
state.q[0, :, :] = 0.25 * np.pi + 3.25 * np.pi * (r <= 1.0)
claw = pyclaw.Controller()
claw.tfinal = 1.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=0,outdir='./_output',solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type=='sharpclaw':
solver = pyclaw.SharpClawSolver1D(riemann.traffic_1D)
else:
solver = pyclaw.ClawSolver1D(riemann.traffic_1D)
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
x = pyclaw.Dimension('x',-1.0,1.0,500)
domain = pyclaw.Domain(x)
num_eqn = 1
state = pyclaw.State(domain,num_eqn)
grid = state.grid
xc=grid.p_centers[0]
state.q[0,:] = 0.75*(xc<0) + 0.1*(xc>0.)
state.problem_data['efix']=True
state.problem_data['umax']=1.
claw = pyclaw.Controller()
claw.tfinal =2.0
claw.solution = pyclaw.Solution(state,domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=False,
kernel_language='Fortran',
outdir='./_output',
solver_type='classic'):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Python':
rs = riemann.shallow_1D_py.shallow_1D
elif kernel_language == 'Fortran':
rs = riemann.shallow_roe_with_efix_1D
if solver_type == 'classic':
solver = pyclaw.ClawSolver1D(rs)
solver.limiters = pyclaw.limiters.tvd.vanleer
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(rs)
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
xlower = -5.0
xupper = 5.0
mx = 500
x = pyclaw.Dimension(xlower, xupper, mx, name='x')
domain = pyclaw.Domain(x)
state = pyclaw.State(domain, num_eqn)
# Gravitational constant
state.problem_data['grav'] = 1.0
xc = state.grid.x.centers
IC = 'dam-break'
x0 = 0.
if IC == 'dam-break':
hl = 3.
ul = 0.
hr = 1.
ur = 0.
state.q[depth, :] = hl * (xc <= x0) + hr * (xc > x0)
state.q[momentum, :] = hl * ul * (xc <= x0) + hr * ur * (xc > x0)
elif IC == '2-shock':
hl = 1.
ul = 1.
hr = 1.
ur = -1.
state.q[depth, :] = hl * (xc <= x0) + hr * (xc > x0)
state.q[momentum, :] = hl * ul * (xc <= x0) + hr * ur * (xc > x0)
elif IC == 'perturbation':
eps = 0.1
state.q[depth, :] = 1.0 + eps * np.exp(-(xc - x0)**2 / 0.5)
state.q[momentum, :] = 0.
claw = pyclaw.Controller()
claw.keep_copy = True
claw.tfinal = 2.0
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.setplot = setplot
return claw
def setup(use_petsc=False,
iplot=False,
htmlplot=False,
outdir='./_output',
solver_type='sharpclaw',
kernel_language='Fortran',
use_char_decomp=False,
tfluct_solver=True):
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if kernel_language == 'Python':
rs = riemann.euler_1D_py.euler_roe_1D
elif kernel_language == 'Fortran':
rs = riemann.euler_with_efix_1D
if solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver1D(rs)
solver.time_integrator = 'RK'
solver.a, solver.b, solver.c = a, b, c
solver.cfl_desired = 0.6
solver.cfl_max = 0.7
if use_char_decomp:
try:
import sharpclaw1 # Import custom Fortran code
solver.fmod = sharpclaw1
solver.tfluct_solver = tfluct_solver # Use total fluctuation solver for efficiency
if solver.tfluct_solver:
try:
import euler_tfluct
solver.tfluct = euler_tfluct
except ImportError:
import logging
logger = logging.getLogger()
logger.error(
'Unable to load tfluct solver, did you run make?')
print 'Unable to load tfluct solver, did you run make?'
raise
except ImportError:
import logging
logger = logging.getLogger()
logger.error(
'Unable to load sharpclaw1 solver, did you run make?')
print 'Unable to load sharpclaw1 solver, did you run make?'
pass
solver.lim_type = 2 # WENO reconstruction
solver.char_decomp = 2 # characteristic-wise reconstruction
else:
solver = pyclaw.ClawSolver1D(rs)
solver.kernel_language = kernel_language
solver.bc_lower[0] = pyclaw.BC.extrap
solver.bc_upper[0] = pyclaw.BC.extrap
mx = 400
x = pyclaw.Dimension(-5.0, 5.0, mx, name='x')
domain = pyclaw.Domain([x])
state = pyclaw.State(domain, num_eqn)
state.problem_data['gamma'] = gamma
if kernel_language == 'Python':
state.problem_data['efix'] = False
xc = state.grid.p_centers[0]
epsilon = 0.2
velocity = (xc < -4.) * 2.629369
pressure = (xc < -4.) * 10.33333 + (xc >= -4.) * 1.
state.q[density, :] = (xc < -4.) * 3.857143 + (xc >= -4.) * (
1 + epsilon * np.sin(5 * xc))
state.q[momentum, :] = velocity * state.q[density, :]
state.q[energy, :] = pressure / (
gamma - 1.) + 0.5 * state.q[density, :] * velocity**2
claw = pyclaw.Controller()
claw.tfinal = 1.8
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.num_output_times = 10
claw.outdir = outdir
claw.setplot = setplot
claw.keep_copy = True
return claw
def setup(use_petsc=False,
outdir='./_output',
solver_type='classic',
mx=30,
my=30,
mz=30,
disable_output=False,
problem='heterogeneous',
**kwargs):
"""
Example python script for solving the 3d acoustics equations.
"""
from clawpack import riemann
if use_petsc:
import clawpack.petclaw as pyclaw
else:
from clawpack import pyclaw
if solver_type == 'classic':
solver = pyclaw.ClawSolver3D(riemann.vc_acoustics_3D)
solver.limiters = pyclaw.limiters.tvd.MC
elif solver_type == 'sharpclaw':
solver = pyclaw.SharpClawSolver3D(riemann.vc_acoustics_3D)
else:
raise Exception('Unrecognized solver_type.')
solver.bc_lower[0] = pyclaw.BC.periodic
solver.bc_upper[0] = pyclaw.BC.periodic
solver.bc_lower[1] = pyclaw.BC.periodic
solver.bc_upper[1] = pyclaw.BC.periodic
solver.bc_lower[2] = pyclaw.BC.periodic
solver.bc_upper[2] = pyclaw.BC.periodic
solver.aux_bc_lower[0] = pyclaw.BC.periodic
solver.aux_bc_upper[0] = pyclaw.BC.periodic
solver.aux_bc_lower[1] = pyclaw.BC.periodic
solver.aux_bc_upper[1] = pyclaw.BC.periodic
solver.aux_bc_lower[2] = pyclaw.BC.periodic
solver.aux_bc_upper[2] = pyclaw.BC.periodic
zl = 1.0 # Impedance in left half
cl = 1.0 # Sound speed in left half
if problem == 'homogeneous':
if solver_type == 'classic':
solver.dimensional_split = True
else:
solver.lim_type = 1
solver.limiters = [4]
mx = mx
my = my
mz = mz # Grid resolution
zr = 1.0 # Impedance in right half
cr = 1.0 # Sound speed in right half
if problem == 'heterogeneous':
if solver_type == 'classic':
solver.dimensional_split = False
solver.bc_lower[0] = pyclaw.BC.wall
solver.bc_lower[1] = pyclaw.BC.wall
solver.bc_lower[2] = pyclaw.BC.wall
solver.aux_bc_lower[0] = pyclaw.BC.wall
solver.aux_bc_lower[1] = pyclaw.BC.wall
solver.aux_bc_lower[2] = pyclaw.BC.wall
mx = mx
my = my
mz = mz # Grid resolution
zr = 2.0 # Impedance in right half
cr = 2.0 # Sound speed in right half
solver.limiters = pyclaw.limiters.tvd.MC
# Initialize domain
x = pyclaw.Dimension('x', -1.0, 1.0, mx)
y = pyclaw.Dimension('y', -1.0, 1.0, my)
z = pyclaw.Dimension('z', -1.0, 1.0, mz)
domain = pyclaw.Domain([x, y, z])
num_eqn = 4
num_aux = 2 # density, sound speed
state = pyclaw.State(domain, num_eqn, num_aux)
X, Y, Z = state.grid.p_centers
state.aux[0, :, :, :] = zl * (X < 0.) + zr * (X >= 0.) # Impedance
state.aux[1, :, :, :] = cl * (X < 0.) + cr * (X >= 0.) # Sound speed
# Set initial density
x0 = -0.5
y0 = 0.
z0 = 0.
if problem == 'homogeneous':
r = np.sqrt((X - x0)**2)
width = 0.2
state.q[0, :, :, :] = (np.abs(r) <= width) * (1. + np.cos(np.pi *
(r) / width))
elif problem == 'heterogeneous':
r = np.sqrt((X - x0)**2 + (Y - y0)**2 + (Z - z0)**2)
width = 0.1
state.q[0, :, :, :] = (np.abs(r - 0.3) <= width) * (
1. + np.cos(np.pi * (r - 0.3) / width))
else:
raise Exception('Unrecognized problem name')
# Set initial velocities to zero
state.q[1, :, :, :] = 0.
state.q[2, :, :, :] = 0.
state.q[3, :, :, :] = 0.
claw = pyclaw.Controller()
claw.keep_copy = True
if disable_output:
claw.output_format = None
claw.solution = pyclaw.Solution(state, domain)
claw.solver = solver
claw.outdir = outdir
claw.tfinal = 2.0
return claw