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Modification on rhoPimpleFoam pEq's for handling rho thermo and incompressible EoS. Adding rho limiters if p is limited.

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This is important when LTS stepping or large Co number is used.

Updating rhoBuoyantPimpleFoam to handle closed domain for rho thermo and incompressible Eos.
Consolidating chtMultiRegionSimpleFoam and chtMultiRegionFoam pEqs to use the same formulation as rhoBuoyantPimpleFoam and
rhoBuoyantSimpleFoam
This commit is contained in:
sergio
2017-06-01 12:39:28 -07:00
parent 111ec17cb5
commit d1b651533f
15 changed files with 229 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
applications/solvers/compressible/rhoPimpleFoam/createFields.H
View File

@ -73,3 +73,26 @@ Info<< "Creating field kinetic energy K\n" << endl;
volScalarField K("K", 0.5*magSqr(U));
#include "createMRF.H"
dimensionedScalar rhoMax
(
dimensionedScalar::lookupOrDefault
(
"rhoMax",
pimple.dict(),
dimDensity,
GREAT
)
);
dimensionedScalar rhoMin
(
dimensionedScalar::lookupOrDefault
(
"rhoMin",
pimple.dict(),
dimDensity,
0
)
);

11
applications/solvers/compressible/rhoPimpleFoam/pEqn.H
View File

@ -84,9 +84,6 @@ else
}
}
// Thermodynamic density update
thermo.correctRho(psi*p - psip0);
#include "rhoEqn.H"
#include "compressibleContinuityErrs.H"
@ -101,12 +98,20 @@ K = 0.5*magSqr(U);
if (pressureControl.limit(p))
{
p.correctBoundaryConditions();
thermo.correctRho(psi*p - psip0, rhoMin, rhoMax);
rho = thermo.rho();
}
else if (pimple.SIMPLErho())
{
thermo.correctRho(psi*p - psip0, rhoMin, rhoMax);
rho = thermo.rho();
}
else
{
thermo.correctRho(psi*p - psip0, rhoMin, rhoMax) ;
}
Info<< "rho max/min : " << max(rho).value() << " " << min(rho).value() << endl;
if (thermo.dpdt())
{

12
applications/solvers/compressible/rhoPimpleFoam/pcEqn.H
View File

@ -95,9 +95,6 @@ else
}
}
// Thermodynamic density update
thermo.correctRho(psi*p - psip0);
#include "rhoEqn.H"
#include "compressibleContinuityErrs.H"
@ -112,12 +109,21 @@ K = 0.5*magSqr(U);
if (pressureControl.limit(p))
{
p.correctBoundaryConditions();
thermo.correctRho(psi*p - psip0, rhoMin, rhoMax);
rho = thermo.rho();
}
else if (pimple.SIMPLErho())
{
thermo.correctRho(psi*p - psip0, rhoMin, rhoMax);
rho = thermo.rho();
}
else
{
thermo.correctRho(psi*p - psip0, rhoMin, rhoMax);
}
Info<< "rho max/min : " << max(rho).value() << " " << min(rho).value() << endl;
if (thermo.dpdt())
{

46
applications/solvers/heatTransfer/buoyantPimpleFoam/pEqn.H
View File

@ -1,3 +1,7 @@
dimensionedScalar compressibility = fvc::domainIntegrate(psi);
bool compressible = (compressibility.value() > SMALL);
rho = thermo.rho();
// Thermodynamic density needs to be updated by psi*d(p) after the
@ -41,6 +45,12 @@ while (pimple.correctNonOrthogonal())
- fvm::laplacian(rhorAUf, p_rgh)
);
p_rghEqn.setReference
(
pRefCell,
compressible ? getRefCellValue(p_rgh, pRefCell) : pRefValue
);
p_rghEqn.solve(mesh.solver(p_rgh.select(pimple.finalInnerIter())));
if (pimple.finalNonOrthogonalIter())
@ -63,12 +73,40 @@ while (pimple.correctNonOrthogonal())
p = p_rgh + rho*gh;
// Thermodynamic density update
thermo.correctRho(psi*p - psip0);
//thermo.correctRho(psi*p - psip0);
#include "rhoEqn.H"
#include "compressibleContinuityErrs.H"
if (p_rgh.needReference())
{
if (!compressible)
{
p += dimensionedScalar
(
"p",
p.dimensions(),
pRefValue - getRefCellValue(p, pRefCell)
);
}
else
{
p += (initialMass - fvc::domainIntegrate(psi*p))
/compressibility;
thermo.correctRho(psi*p - psip0);
rho = thermo.rho();
}
p_rgh = p - rho*gh;
}
else
{
thermo.correctRho(psi*p - psip0);
}
rho = thermo.rho();
if (thermo.dpdt())
{
dpdt = fvc::ddt(p);
}
#include "rhoEqn.H"
#include "compressibleContinuityErrs.H"

23
applications/solvers/heatTransfer/buoyantSimpleFoam/createFields.H
View File

@ -88,3 +88,26 @@ dimensionedScalar totalVolume = sum(mesh.V());
#include "createMRF.H"
#include "createRadiationModel.H"
dimensionedScalar rhoMax
(
dimensionedScalar::lookupOrDefault
(
"rhoMax",
simple.dict(),
dimDensity,
GREAT
)
);
dimensionedScalar rhoMin
(
dimensionedScalar::lookupOrDefault
(
"rhoMin",
simple.dict(),
dimDensity,
0
)
);

17
applications/solvers/heatTransfer/buoyantSimpleFoam/pEqn.H
View File

@ -1,7 +1,4 @@
{
rho = thermo.rho();
rho.relax();
volScalarField rAU("rAU", 1.0/UEqn.A());
surfaceScalarField rhorAUf("rhorAUf", fvc::interpolate(rho*rAU));
volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p_rgh));
@ -24,6 +21,8 @@
// Update the pressure BCs to ensure flux consistency
constrainPressure(p_rgh, rho, U, phiHbyA, rhorAUf, MRF);
dimensionedScalar compressibility = fvc::domainIntegrate(psi);
bool compressible = (compressibility.value() > SMALL);
while (simple.correctNonOrthogonal())
{
@ -32,7 +31,12 @@
fvm::laplacian(rhorAUf, p_rgh) == fvc::div(phiHbyA)
);
p_rghEqn.setReference(pRefCell, getRefCellValue(p_rgh, pRefCell));
p_rghEqn.setReference
(
pRefCell,
compressible ? getRefCellValue(p_rgh, pRefCell) : pRefValue
);
p_rghEqn.solve();
if (simple.finalNonOrthogonalIter())
@ -51,12 +55,9 @@
}
}
#include "continuityErrs.H"
p = p_rgh + rho*gh;
dimensionedScalar compressibility = fvc::domainIntegrate(psi);
bool compressible = (compressibility.value() > SMALL);
#include "continuityErrs.H"
// For closed-volume cases adjust the pressure level
// to obey overall mass continuity

20
applications/solvers/heatTransfer/chtMultiRegionFoam/chtMultiRegionSimpleFoam/fluid/pEqn.H
View File

@ -1,8 +1,10 @@
{
/*
rho = thermo.rho();
rho = max(rho, rhoMin[i]);
rho = min(rho, rhoMax[i]);
rho.relax();
*/
volScalarField rAU("rAU", 1.0/UEqn.A());
surfaceScalarField rhorAUf("rhorAUf", fvc::interpolate(rho*rAU));
@ -67,10 +69,22 @@
// For closed-volume cases adjust the pressure level
// to obey overall mass continuity
if (closedVolume && compressible)
if (closedVolume)
{
p += (initialMass - fvc::domainIntegrate(thermo.rho()))
/compressibility;
if (!compressible)
{
p += dimensionedScalar
(
"p",
p.dimensions(),
pRefValue - getRefCellValue(p, pRefCell)
);
}
else
{
p += (initialMass - fvc::domainIntegrate(psi*p))
/compressibility;
}
p_rgh = p - rho*gh;
}

19
applications/solvers/heatTransfer/chtMultiRegionFoam/fluid/createFluidFields.H
View File

@ -19,6 +19,9 @@ List<bool> frozenFlowFluid(fluidRegions.size(), false);
PtrList<IOMRFZoneList> MRFfluid(fluidRegions.size());
PtrList<fv::options> fluidFvOptions(fluidRegions.size());
List<label> refCellFluid(fluidRegions.size());
List<scalar> refValueFluid(fluidRegions.size());
// Populate fluid field pointer lists
forAll(fluidRegions, i)
{
@ -248,4 +251,20 @@ forAll(fluidRegions, i)
);
turbulence[i].validate();
refCellFluid[i] = 0;
refValueFluid[i] = 0.0;
if (p_rghFluid[i].needReference())
{
setRefCell
(
thermoFluid[i].p(),
p_rghFluid[i],
pimpleDict,
refCellFluid[i],
refValueFluid[i]
);
}
}

57
applications/solvers/heatTransfer/chtMultiRegionFoam/fluid/pEqn.H
View File

@ -4,6 +4,10 @@ bool compressible = (compressibility.value() > SMALL);
rho = thermo.rho();
// Thermodynamic density needs to be updated by psi*d(p) after the
// pressure solution
const volScalarField psip0(psi*p);
volScalarField rAU("rAU", 1.0/UEqn.A());
surfaceScalarField rhorAUf("rhorAUf", fvc::interpolate(rho*rAU));
volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p_rgh));
@ -32,10 +36,6 @@ constrainPressure(p_rgh, rho, U, phiHbyA, rhorAUf, MRF);
+ fvc::div(phiHbyA)
);
// Thermodynamic density needs to be updated by psi*d(p) after the
// pressure solution
const volScalarField psip0(psi*p);
for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
{
fvScalarMatrix p_rghEqn
@ -44,6 +44,12 @@ constrainPressure(p_rgh, rho, U, phiHbyA, rhorAUf, MRF);
- fvm::laplacian(rhorAUf, p_rgh)
);
p_rghEqn.setReference
(
pRefCell,
compressible ? getRefCellValue(p_rgh, pRefCell) : pRefValue
);
p_rghEqn.solve
(
mesh.solver
@ -62,6 +68,9 @@ constrainPressure(p_rgh, rho, U, phiHbyA, rhorAUf, MRF);
if (nonOrth == nNonOrthCorr)
{
phi = phiHbyA + p_rghEqn.flux();
p_rgh.relax();
U = HbyA
+ rAU*fvc::reconstruct((phig + p_rghEqn.flux())/rhorAUf);
U.correctBoundaryConditions();
@ -73,15 +82,10 @@ constrainPressure(p_rgh, rho, U, phiHbyA, rhorAUf, MRF);
p = p_rgh + rho*gh;
// Thermodynamic density update
thermo.correctRho(psi*p - psip0);
//thermo.correctRho(psi*p - psip0);
}
// Update pressure time derivative if needed
if (thermo.dpdt())
{
dpdt = fvc::ddt(p);
}
// Solve continuity
#include "rhoEqn.H"
@ -91,10 +95,35 @@ if (thermo.dpdt())
// For closed-volume cases adjust the pressure and density levels
// to obey overall mass continuity
if (closedVolume && compressible)
if (closedVolume)
{
p += (initialMass - fvc::domainIntegrate(thermo.rho()))
/compressibility;
rho = thermo.rho();
if (!compressible)
{
p += dimensionedScalar
(
"p",
p.dimensions(),
pRefValue - getRefCellValue(p, pRefCell)
);
}
else
{
p += (initialMass - fvc::domainIntegrate(psi*p))
/compressibility;
thermo.correctRho(psi*p - psip0);
rho = thermo.rho();
}
p_rgh = p - rho*gh;
}
else
{
thermo.correctRho(psi*p - psip0);
}
rho = thermo.rho();
// Update pressure time derivative if needed
if (thermo.dpdt())
{
dpdt = fvc::ddt(p);
}

3
applications/solvers/heatTransfer/chtMultiRegionFoam/fluid/setRegionFluidFields.H
View File

@ -33,3 +33,6 @@
);
const bool frozenFlow = frozenFlowFluid[i];
const label pRefCell = refCellFluid[i];
const scalar pRefValue = refValueFluid[i];