def residuals(self, part, facefluxes, celltransient, cellsource):
"""
Calculate FVM residuals
Parameters:
-----------
facefluxes: vector or None
fluxes per unit of surface or None
celltransient: float or vector
transient term per unit of volume
cellsource: float or vector
source term per unit of volume
Returns: tuple (residuals,FdS)
--------
residuals:
residuals for each cell, per unit of volume
FdS:
integral FdS per cell
"""
assert part is self.mesh.internal or part is self.mesh.boundary
idx = part.idx
if facefluxes is None:
FdS = 0.
else:
FdS = ad.dot(part.fluxsum, facefluxes)
celltransient = ad.getitem(celltransient, idx)
cellsource = ad.getitem(cellsource, idx)
return self.idx[idx], -FdS / \
part.cells['volume'] + celltransient - cellsource
def _concentration(self, ctx, eq, idx, imref, ref, **kwargs):
assert eq.z in [1, -1]
if idx is not None:
Eband = ad.getitem(ctx.varsOf(eq)[ref], idx)
else:
Eband = ctx.varsOf(eq)[ref]
return self.c(ctx, eq, -(imref - Eband) / eq.z, **kwargs)
def image_correction(self, ctx, eq, ixto):
if not self.image_force:
return 0.
n = eq.mesh.boundaries[self.name]['normal']
F = eq.z * eq.mesh.dotv(ctx.varsOf(eq.poisson)['Ecellv'][ixto], n)
F = where(F > self.F_eps, F, self.F_eps)
return -eq.z * \
functions.EmtageODwyerBarrierLowering(
F, getitem(ctx.varsOf(eq.poisson)['epsilon'], ixto))
def residuals(self, ctx, eq, flux, source=None, transient=0.):
variables = ctx.varsOf(eq)
yield eq.residuals(eq.mesh.internal, flux, cellsource=source, celltransient=transient)
n = len(eq.mesh.boundary.cells)
bc_FdS = sparsesum(n, variables['boundary_FdS'])
bc_source = sparsesum(n, variables['boundary_sources'])
if flux is not None:
bc_FdS = dot(eq.mesh.boundary.fluxsum, flux) + bc_FdS
if source is not None:
bc_source = getitem(source, eq.mesh.boundary.idx) + bc_source
bc_transient = getitem(transient, eq.mesh.boundary.idx)
variables['total_boundary_FdS'] = bc_FdS
variables['total_boundary_sources'] = bc_source
variables['total_boundary_transient'] = bc_transient
self._evaluate_bc(
ctx,
eq,
bc_FdS,
cellsource_boundary=bc_source,
celltransient_boundary=bc_transient)
def finalize(self, target, bc_conservation):
bc_label_conservation = ad.sparsesum_bare(len(self.bc_labels),
bc_conservation)
for eq in self.equations:
if isinstance(eq, FVMConservationEquation):
bc_free_dof = np.arange(len(
eq.mesh.boundary.idx))[eq.bc_dof_is_free]
i = eq.idx[eq.mesh.boundary.idx[bc_free_dof]]
j = self.bc_labels[i]
yield i, ad.getitem(bc_label_conservation,
j) * (1. / self.bc_label_volume[j])
def value(self, ctx, eq):
return getitem(
ctx.varsOf(eq.semiconductor)['conc_Ef'][id(eq.owner_eq)],
eq._getIdx())
def potential(self, ctx, eq):
return self.voltage(ctx, eq) + getitem(
ctx.varsOf(eq.semiconductor)['Efv'], eq._getIdx())
def branch_cut_limit(ix):
return self.impl.b(
np.sqrt(2.) * getitem(nsigma, ix), self.g3_max_c)
def branch_if_inlimit(ix):
return getitem(info['b'], ix)
