zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

settlingFoam: Changed to solving for pmh (static pressure minus hydrostatic pressure).

Browse Source 
While p and pmh (pd in OpenFOAM-1.5.?) are equivalent on orthogonal meshes they
are not on non-orthogonal meshes and the difference is very important for
buoyancy-dominated flows such as settling.  settlingFoam is now written in terms
of pmh (static pressure minus hydrostatic pressure) which used to be called pd
but that confused too may people.
This commit is contained in:
henry
2010-01-28 16:06:08 +00:00
parent b1b7fbec65
commit 3b038c3702
14 changed files with 149 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
applications/solvers/multiphase/settlingFoam/UEqn.H
View File

@ -22,8 +22,7 @@
==
fvc::reconstruct
(
fvc::interpolate(rho)*(g & mesh.Sf())
- fvc::snGrad(p)*mesh.magSf()
(- ghf*fvc::snGrad(rho) - fvc::snGrad(pmh))*mesh.magSf()
)
);
}

56
applications/solvers/multiphase/settlingFoam/createFields.H
View File

@ -1,9 +1,9 @@
Info<< "Reading field p\n" << endl;
volScalarField p
Info<< "Reading field pmh\n" << endl;
volScalarField pmh
(
IOobject
(
"p",
"pmh",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
@ -119,11 +119,6 @@
#include "compressibleCreatePhi.H"
label pRefCell = 0;
scalar pRefValue = 0.0;
setRefCell(p, mesh.solutionDict().subDict("PISO"), pRefCell, pRefValue);
Info<< "Calculating field mul\n" << endl;
volScalarField mul
(
@ -346,3 +341,48 @@
),
mut + mul
);
Info<< "Calculating field (g.h)f\n" << endl;
volScalarField gh("gh", g & mesh.C());
surfaceScalarField ghf = surfaceScalarField("gh", g & mesh.Cf());
volScalarField p
(
IOobject
(
"p",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
pmh + rho*gh
);
label pmhRefCell = 0;
scalar pmhRefValue = 0.0;
setRefCell
(
pmh,
mesh.solutionDict().subDict("PISO"),
pmhRefCell,
pmhRefValue
);
scalar pRefValue = 0.0;
if (pmh.needReference())
{
pRefValue = readScalar
(
mesh.solutionDict().subDict("PISO").lookup("pRefValue")
);
p += dimensionedScalar
(
"p",
p.dimensions(),
pRefValue - getRefCellValue(p, pmhRefCell)
);
}

52
applications/solvers/multiphase/settlingFoam/pmhEqn.H Normal file
View File

@ -0,0 +1,52 @@
volScalarField rUA = 1.0/UEqn.A();
surfaceScalarField rUAf
(
"(rho*(1|A(U)))",
fvc::interpolate(rho)*fvc::interpolate(rUA)
);
U = rUA*UEqn.H();
phi =
fvc::interpolate(rho)
*(
(fvc::interpolate(U) & mesh.Sf())
+ fvc::ddtPhiCorr(rUA, rho, U, phi)
);
surfaceScalarField phiU("phiU", phi);
phi -= ghf*fvc::snGrad(rho)*rUAf*mesh.magSf();
for(int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
{
fvScalarMatrix pmhEqn
(
fvm::laplacian(rUAf, pmh) == fvc::ddt(rho) + fvc::div(phi)
);
pmhEqn.setReference(pmhRefCell, pmhRefValue);
pmhEqn.solve();
if (nonOrth == nNonOrthCorr)
{
phi -= pmhEqn.flux();
}
}
p == pmh + rho*gh;
if (pmh.needReference())
{
p += dimensionedScalar
(
"p",
p.dimensions(),
pRefValue - getRefCellValue(p, pmhRefCell)
);
}
#include "rhoEqn.H"
#include "compressibleContinuityErrs.H"
U += rUA*fvc::reconstruct((phi - phiU)/rUAf);
U.correctBoundaryConditions();

6
applications/solvers/multiphase/settlingFoam/settlingFoam.C
View File

@ -64,6 +64,8 @@ int main(int argc, char *argv[])
#include "rhoEqn.H"
for (int oCorr=0; oCorr<nOuterCorr; oCorr++)
{
#include "calcVdj.H"
#include "UEqn.H"
@ -72,14 +74,14 @@ int main(int argc, char *argv[])
#include "correctViscosity.H"
// --- PISO loop
for (int corr=0; corr<nCorr; corr++)
{
#include "pEqn.H"
#include "pmhEqn.H"
}
#include "kEpsilon.H"
}
runTime.write();

2
tutorials/multiphase/settlingFoam/ras/dahl/0/p → tutorials/multiphase/settlingFoam/ras/dahl/0/pmh
View File

@ -10,7 +10,7 @@ FoamFile
version 2.0;
format ascii;
class volScalarField;
object p;
object pmh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

2
tutorials/multiphase/settlingFoam/ras/dahl/constant/polyMesh/boundary
View File

@ -1,7 +1,7 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.6.x |
| \\ / O peration | Version: dev |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/

4
tutorials/multiphase/settlingFoam/ras/dahl/system/fvSchemes
View File

@ -39,7 +39,7 @@ laplacianSchemes
{
default none;
laplacian(muEff,U) Gauss linear corrected;
laplacian((rho*(1|A(U))),p) Gauss linear corrected;
laplacian((rho*(1|A(U))),pmh) Gauss linear corrected;
laplacian(DkEff,k) Gauss linear corrected;
laplacian(DepsilonEff,epsilon) Gauss linear corrected;
laplacian(mut,Alpha) Gauss linear corrected;
@ -58,7 +58,7 @@ snGradSchemes
fluxRequired
{
default no;
p ;
pmh ;
}

2
tutorials/multiphase/settlingFoam/ras/dahl/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
p
pmh
{
solver PCG;
preconditioner DIC;

3
tutorials/multiphase/settlingFoam/ras/tank3D/0/U
View File

@ -57,7 +57,8 @@ boundaryField
WALL6
{
type fixedValue;
type translatingWallVelocity;
U (-0.003 0 0);
value uniform (-0.003 0 0);
}

17
tutorials/multiphase/settlingFoam/ras/tank3D/0/p → tutorials/multiphase/settlingFoam/ras/tank3D/0/pmh
View File

@ -10,7 +10,7 @@ FoamFile
version 2.0;
format ascii;
class volScalarField;
object p;
object pmh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@ -28,27 +28,32 @@ boundaryField
INLE1
{
type zeroGradient;
type buoyantPressure;
value uniform 0;
}
OUTL9
{
type zeroGradient;
type buoyantPressure;
value uniform 0;
}
OUTL10
{
type zeroGradient;
type buoyantPressure;
value uniform 0;
}
OUTL11
{
type zeroGradient;
type buoyantPressure;
value uniform 0;
}
OUTL12
{
type zeroGradient;
type buoyantPressure;
value uniform 0;
}
WALL6

2
tutorials/multiphase/settlingFoam/ras/tank3D/Allclean
View File

@ -3,4 +3,4 @@
# Clean time folders only
rm -rf *[1-9]*
rm -f log.* 2>/dev/null
rm log.*

2
tutorials/multiphase/settlingFoam/ras/tank3D/system/controlDict
View File

@ -17,7 +17,7 @@ FoamFile
application settlingFoam;
startFrom startTime;
startFrom latestTime;
startTime 0;

4
tutorials/multiphase/settlingFoam/ras/tank3D/system/fvSchemes
View File

@ -39,7 +39,7 @@ laplacianSchemes
{
default none;
laplacian(muEff,U) Gauss linear corrected;
laplacian((rho*(1|A(U))),p) Gauss linear corrected;
laplacian((rho*(1|A(U))),pmh) Gauss linear corrected;
laplacian(DkEff,k) Gauss linear corrected;
laplacian(DepsilonEff,epsilon) Gauss linear corrected;
laplacian(mut,Alpha) Gauss linear corrected;
@ -58,7 +58,7 @@ snGradSchemes
fluxRequired
{
default no;
p ;
pmh ;
}

10
tutorials/multiphase/settlingFoam/ras/tank3D/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
p
pmh
{
solver PCG;
preconditioner DIC;
@ -68,9 +68,17 @@ solvers
PISO
{
momentumPredictor yes;
nOuterCorrectors 1;
nCorrectors 2;
nNonOrthogonalCorrectors 0;
}
relaxationFactors
{
U 1;
k 1;
epsilon 1;
}
// ************************************************************************* //