def _UEqn(phi, U, p, turbulence, pZones, pressureImplicitPorosity, nUCorr, eqnResidual, maxResidual):
from Foam import fvm, fvc
# Construct the Momentum equation
# The initial C++ expression does not work properly, because of
# 1. turbulence.divDevRhoReff( U ) - changes values for the U boundaries
# 2. the order of expression arguments computation differs with C++
# UEqn = fvm.div( phi, U ) - fvm.Sp( fvc.div( phi ), U ) + turbulence.divDevRhoReff( U )
UEqn = turbulence.divDevRhoReff(U) + (fvm.div(phi, U) - fvm.Sp(fvc.div(phi), U))
UEqn.relax()
# Include the porous media resistance and solve the momentum equation
# either implicit in the tensorial resistance or transport using by
# including the spherical part of the resistance in the momentum diagonal
trAU = None
trTU = None
if pressureImplicitPorosity:
from Foam.OpenFOAM import sphericalTensor, tensor
tTU = tensor(sphericalTensor.I) * UEqn.A()
pZones.addResistance(UEqn, tTU)
trTU = tTU.inv()
from Foam.OpenFOAM import word
trTU.rename(word("rAU"))
for UCorr in range(nUCorr):
U.ext_assign(trTU & (UEqn.H() - fvc.grad(p)))
pass
U.correctBoundaryConditions()
else:
pZones.addResistance(UEqn)
from Foam.finiteVolume import solve
eqnResidual = solve(UEqn == -fvc.grad(p)).initialResidual()
maxResidual = max(eqnResidual, maxResidual)
trAU = 1.0 / UEqn.A()
from Foam.OpenFOAM import word
trAU.rename(word("rAU"))
pass
return UEqn, trTU, trAU, eqnResidual, maxResidual
def _UEqn(phi, U, p, turbulence, pZones, pressureImplicitPorosity, nUCorr,
eqnResidual, maxResidual):
from Foam import fvm, fvc
# Construct the Momentum equation
# The initial C++ expression does not work properly, because of
# 1. turbulence.divDevRhoReff( U ) - changes values for the U boundaries
# 2. the order of expression arguments computation differs with C++
#UEqn = fvm.div( phi, U ) - fvm.Sp( fvc.div( phi ), U ) + turbulence.divDevRhoReff( U )
UEqn = turbulence.divDevRhoReff(U) + (fvm.div(phi, U) -
fvm.Sp(fvc.div(phi), U))
UEqn.relax()
# Include the porous media resistance and solve the momentum equation
# either implicit in the tensorial resistance or transport using by
# including the spherical part of the resistance in the momentum diagonal
trAU = None
trTU = None
if pressureImplicitPorosity:
from Foam.OpenFOAM import sphericalTensor, tensor
tTU = tensor(sphericalTensor.I) * UEqn.A()
pZones.addResistance(UEqn, tTU)
trTU = tTU.inv()
from Foam.OpenFOAM import word
trTU.rename(word("rAU"))
gradp = fvc.grad(p)
for UCorr in range(nUCorr):
U.ext_assign(trTU & (UEqn.H() - gradp))
pass
U.correctBoundaryConditions()
else:
pZones.addResistance(UEqn)
from Foam.finiteVolume import solve
eqnResidual = solve(UEqn == -fvc.grad(p)).initialResidual()
maxResidual = max(eqnResidual, maxResidual)
trAU = 1.0 / UEqn.A()
from Foam.OpenFOAM import word
trAU.rename(word("rAU"))
pass
return UEqn, trTU, trAU, eqnResidual, maxResidual