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Granular phase momentum budget #184

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merged 4 commits into from
Feb 21, 2024
Merged

Granular phase momentum budget #184

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b1a1597
Fix Taua computation and allow granular phase momentum budget
remichassagne Jan 12, 2024
d28dd40
Small modif in writeTau before pull request
remichassagne Jan 12, 2024
9ff5d52
Fix checkstyle
remichassagne Jan 12, 2024
290e79c
Fix chackstyle
remichassagne Jan 12, 2024
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177 changes: 176 additions & 1 deletion solver/createFields.H
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Original file line number Diff line number Diff line change
Expand Up @@ -491,7 +491,10 @@ Switch writeTau
(
forceProperties.getOrDefault<Switch>("writeTau", false)
);

Switch writeMomentumBudget
(
forceProperties.getOrDefault<Switch>("writeMomentumBudget", false)
);

Info<< "Initializing with specified pressure gradient:"
<< gradPOSC.value() << endl << endl;
Expand Down Expand Up @@ -876,6 +879,178 @@ volScalarField p
p_rbgh + rhob*gh
);


volVectorField SolidPressureContr
(
IOobject
(
"SolidPressureContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(p_rbgh)
);

volVectorField divTauaContr
(
IOobject
(
"divTauaContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);


volVectorField ViscStressContr
(
IOobject
(
"ViscStressContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField FrictContr
(
IOobject
(
"FrictContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField phiRaContr
(
IOobject
(
"phiRaContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField phiRa2Contr
(
IOobject
(
"phiRa2Contr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField divRcaContr
(
IOobject
(
"divRcaContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField RcaContr
(
IOobject
(
"RcaContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField BulkContr
(
IOobject
(
"BulkContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField gravityContr
(
IOobject
(
"gravityContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField DragContr
(
IOobject
(
"DragContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField SuspContr
(
IOobject
(
"SuspContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);

volVectorField ExtContr
(
IOobject
(
"ExtContr",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::grad(pff)
);


label pRefCell = 0;
scalar pRefValue = 0.0;
setRefCell
Expand Down
59 changes: 57 additions & 2 deletions solver/writeOutput.H
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Original file line number Diff line number Diff line change
Expand Up @@ -27,11 +27,66 @@ if (runTime.outputTime())
{
if (writeTau == 1)
{
Taua = rhoa*(alpha*nuEffa+nuFra)*dev(fvc::grad(Ua));
Taub = rhob*(scalar(1.0)-alpha)*nuEffb*dev(fvc::grad(Ub));
Taua = fvc::reconstruct(
fvc::interpolate(rhoa*(alpha*nuEffa+nuFra)) *
mesh.magSf()*fvc::snGrad(Ua)) +
rhoa*(alpha*nuEffa+nuFra)*dev(gradUaT);
Taub = fvc::reconstruct(
fvc::interpolate(rhob*(scalar(1.0)-alpha)*nuEffb) *
mesh.magSf()*fvc::snGrad(Ub)) +
rhob*(scalar(1.0)-alpha)*nuEffb*dev(gradUbT);
Taua.write();
Taub.write();
}
if (writeMomentumBudget == 1)
{

volTensorField Rca(
"Rca",
((2.0/3.0)*I)*((nuEffa+nuFra/(alpha+alphaSmall))*tr(gradUaT)
+ spherSigmaSGSa)
- (nuEffa+nuFra/(alpha+alphaSmall))*gradUaT
);

volTensorField Rca2(
"Rca2",
((2.0/3.0)*I)*((alpha*nuEffa+nuFra)*tr(gradUaT)
+ alpha*spherSigmaSGSa)
- (alpha*nuEffa+nuFra)*gradUaT
);
volVectorField Ra(
"Ra",
-nuEffa*fvc::grad(alpha)/(alpha+alphaSmall)
);

surfaceScalarField phiRa(
-fvc::interpolate(nuEffa)*mesh.magSf()*(fvc::snGrad(alpha))
/fvc::interpolate(alpha+ alphaSmall)
);

SolidPressureContr = -fvc::grad(pa+pff);
ViscStressContr = rhoa*alpha*fvc::laplacian(nuEffa, Ua);
FrictContr = rhoa*fvc::laplacian(nuFra, Ua);
phiRaContr = -rhoa*alpha*fvc::div(phiRa, Ua, "div(phiRa,Ua)");
phiRa2Contr = rhoa*alpha*fvc::Sp(fvc::div(phiRa), Ua);
divRcaContr = -rhoa*alpha*fvc::div(Rca);
RcaContr = -rhoa*alpha/(alpha+alphaSmall)*(fvc::grad(alpha) & Rca);
BulkContr = fvc::grad(lambdaUa*tr(gradUaT));
divTauaContr = ViscStressContr + FrictContr + phiRaContr +
phiRa2Contr + divRcaContr + RcaContr + BulkContr;

gravityContr=alpha/(alpha+alphaSmall)*(rhoa-rhob)*g;
DragContr=alpha*beta*K*(Ub-Ua);
ExtContr=rhoa*alpha*gradPOSC/(tilt*rhob +(1.0-tilt)*rhoa);
SuspContr=-SUS*K*beta*turbulenceb->nut()
*((SUS_I*iso-SUS_A*aniso) & fvc::grad(alpha));

divTauaContr.write();
gravityContr.write();
DragContr.write();
ExtContr.write();
SuspContr.write();
}
if (granularRheology.on())
{
pa.write();
Expand Down
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