Updates to MRF handling for block-coupled solver
This commit is contained in:
Hrvoje Jasak
parent
111979afe5
commit
0413c44e09
7 changed files with 117 additions and 15 deletions
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@ -9,13 +9,10 @@
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+ turbulence->divDevReff()
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);
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// Add MRF sources
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mrfZones.addCoriolis(UEqn);
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// Add porous sources
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// Add MRF and porous sources implicitly. HJ, 18/Nov/2017
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tmp<volTensorField> tTU;
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if (addPorosity)
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if (addMRF || addPorosity)
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{
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tTU = tmp<volTensorField>
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(
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@ -35,6 +32,10 @@
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);
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volTensorField& TU = tTU();
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// Add implicit MRF source as a Hodge dual of the rotational velocity
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TU += *mrfZones.omega();
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// Add implicit resistance
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pZones.addResistance(UEqn, TU);
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trTU = inv(TU + tensor(I)*UEqn.A());
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@ -52,7 +53,7 @@
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// Insert momentum equation
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UpEqn.insertEquation(0, UEqn);
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if (addPorosity)
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if (addMRF || addPorosity)
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{
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// Manually over-ride the 3x3 block to handle the off-diagonal
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// part of the Ap coefficient
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@ -62,11 +63,43 @@
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const scalarField& V = mesh.V().field();
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// Note: insertion should only happen in porous cell zones
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// Note: insertion should only happen in MRF and porous cell zones
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// HJ, 14/Mar/2016
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// Warning. Possible problem with a zone which is both MRF and porous
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// The solution is to do the loop below everywhere
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// Currently only inserting zones for efficiency. HJ, 18/Nov/2017
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register label cellI;
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forAll (mrfZones, mrfZoneI)
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{
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const labelList& curZoneCells = mrfZones[mrfZoneI].zone();
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// Loop over all cells in the zone
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forAll (curZoneCells, zcI)
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{
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cellI = curZoneCells[zcI];
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const scalar& cellV = V[cellI];
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const tensor& cellTU = TUIn[cellI];
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CoeffField<vector4>::squareType& cellDD = DD[cellI];
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cellDD(0, 0) += cellV*cellTU.xx();
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cellDD(0, 1) += cellV*cellTU.xy();
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cellDD(0, 2) += cellV*cellTU.xz();
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cellDD(1, 0) += cellV*cellTU.yx();
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cellDD(1, 1) += cellV*cellTU.yy();
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cellDD(2, 2) += cellV*cellTU.yz();
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cellDD(2, 0) += cellV*cellTU.zx();
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cellDD(2, 1) += cellV*cellTU.zy();
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cellDD(2, 2) += cellV*cellTU.zz();
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}
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}
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forAll (pZones, pZoneI)
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{
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const labelList& curZoneCells = pZones[pZoneI].zone();
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@ -1,2 +1,9 @@
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MRFZones mrfZones(mesh);
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mrfZones.correctBoundaryVelocity(U);
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bool addMRF = false;
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if (!mrfZones.empty())
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{
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addMRF = true;
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}
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@ -2,7 +2,7 @@
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tmp<fvScalarMatrix> tpEqn;
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tmp<surfaceScalarField> tpresSource;
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if (addPorosity)
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if (addMRF || addPorosity)
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{
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// Collect pressure source with tensorial 1/Ap
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const volTensorField& rTU = trTU();
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@ -581,6 +581,20 @@ void Foam::MRFZone::addCoriolis
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}
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void Foam::MRFZone::addOmega(volVectorField& omg) const
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{
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const vector rotVel = Omega();
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// Set omega in all cells of the rotating cell zone
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const labelList& cells = mesh_.cellZones()[cellZoneID_];
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forAll (cells, i)
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{
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omg[cells[i]] = rotVel;
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}
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}
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void Foam::MRFZone::relativeVelocity(volVectorField& U) const
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{
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const volVectorField& C = mesh_.C();
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@ -111,7 +111,7 @@ class MRFZone
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//- Time for which mesh velocity is calculated
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mutable scalar meshVelTime_;
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// Private Static Data
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@ -203,6 +203,18 @@ public:
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return name_;
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}
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//- Return cellZone number
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label zoneId() const
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{
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return cellZoneID_;
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}
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//- Return cellZone
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const cellZone& zone() const
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{
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return mesh_.cellZones()[cellZoneID_];
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}
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//- Return the MRFZone dictionary
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const dictionary& dict() const
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{
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@ -235,7 +247,7 @@ public:
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{
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// Clear mesh velocity
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deleteDemandDrivenData(meshVelocityPtr_);
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// Only updates face addressing
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setMRFFaces();
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}
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@ -250,6 +262,9 @@ public:
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fvVectorMatrix& UEqn
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) const;
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//- Add omega within the MRF region
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void addOmega(volVectorField& omg) const;
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//- Make the given absolute velocity relative within the MRF region
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void relativeVelocity(volVectorField& U) const;
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@ -276,7 +291,7 @@ public:
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surfaceScalarField& phi
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) const;
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//- Compute the pseudo mesh phi of the MRF region
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//- Compute pseudo mesh phi for the MRF region
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void meshPhi(surfaceScalarField& phi) const;
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//- Correct the boundary velocity for the roation of the MRF region
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@ -57,6 +57,35 @@ Foam::MRFZones::MRFZones(const fvMesh& mesh)
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::tmp<Foam::volVectorField> Foam::MRFZones::omega() const
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{
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tmp<volVectorField> tMRFZonesOmega
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(
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new volVectorField
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(
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IOobject
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(
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"MRFZonesOmega",
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mesh_.time().timeName(),
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mesh_,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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mesh_,
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dimensionedVector("zero", dimless/dimTime, vector::zero)
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)
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);
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volVectorField& MRFZonesOmega = tMRFZonesOmega();
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forAll (*this, i)
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{
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operator[](i).addOmega(MRFZonesOmega);
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}
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return tMRFZonesOmega;
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}
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Foam::tmp<Foam::surfaceScalarField> Foam::MRFZones::fluxCorrection() const
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{
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tmp<surfaceScalarField> tMRFZonesPhiCorr
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@ -88,7 +117,7 @@ Foam::tmp<Foam::surfaceScalarField> Foam::MRFZones::fluxCorrection() const
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Foam::tmp<Foam::surfaceScalarField> Foam::MRFZones::meshPhi() const
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{
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tmp<surfaceScalarField> tMRFZonesPhiCorr
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tmp<surfaceScalarField> tMRFZonesFaceU
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(
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new surfaceScalarField
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(
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@ -104,14 +133,14 @@ Foam::tmp<Foam::surfaceScalarField> Foam::MRFZones::meshPhi() const
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dimensionedScalar("zero", dimVolume/dimTime, 0)
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)
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);
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surfaceScalarField& MRFZonesPhiCorr = tMRFZonesPhiCorr();
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surfaceScalarField& MRFZonesFaceU = tMRFZonesFaceU();
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forAll (*this, i)
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{
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operator[](i).meshPhi(MRFZonesPhiCorr);
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operator[](i).meshPhi(MRFZonesFaceU);
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}
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return tMRFZonesPhiCorr;
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return tMRFZonesFaceU;
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}
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@ -77,12 +77,16 @@ public:
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// Member Functions
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//- Return cell centre omega over all zones
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tmp<volVectorField> omega() const;
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//- Return raw correction flux
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tmp<surfaceScalarField> fluxCorrection() const;
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//- Return pseudo mesh flux
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tmp<surfaceScalarField> meshPhi() const;
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// Incompressible MRF
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//- Add the Coriolis force contribution to the momentum equation
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