86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
{
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labelList cellBoundaryFaceCount(epsilon.size(), 0);
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const scalar Cmu25 = ::pow(Cmu.value(), 0.25);
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const scalar Cmu75 = ::pow(Cmu.value(), 0.75);
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const scalar kappa_ = kappa.value();
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const fvPatchList& patches = mesh.boundary();
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//- Initialise the near-wall P field to zero
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forAll(patches, patchi)
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{
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const fvPatch& curPatch = patches[patchi];
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if (isA<wallFvPatch>(curPatch))
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{
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forAll(curPatch, facei)
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{
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label faceCelli = curPatch.faceCells()[facei];
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epsilon[faceCelli] = 0.0;
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G[faceCelli] = 0.0;
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}
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}
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}
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//- Accumulate the wall face contributions to epsilon and G
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// Increment cellBoundaryFaceCount for each face for averaging
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forAll(patches, patchi)
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{
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const fvPatch& curPatch = patches[patchi];
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if (isA<wallFvPatch>(curPatch))
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{
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const scalarField& mutw = mut.boundaryField()[patchi];
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const scalarField& mucw = muc.boundaryField()[patchi];
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scalarField magFaceGradU
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(
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mag(U.boundaryField()[patchi].snGrad())
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);
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forAll(curPatch, facei)
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{
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label faceCelli = curPatch.faceCells()[facei];
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// For corner cells (with two boundary or more faces),
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// epsilon and G in the near-wall cell are calculated
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// as an average
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cellBoundaryFaceCount[faceCelli]++;
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epsilon[faceCelli] +=
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Cmu75*::pow(k[faceCelli], 1.5)
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/(kappa_*y[patchi][facei]);
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G[faceCelli] +=
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(mutw[facei] + mucw[facei])
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*magFaceGradU[facei]
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*Cmu25*::sqrt(k[faceCelli])
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/(kappa_*y[patchi][facei]);
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}
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}
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}
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// perform the averaging
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forAll(patches, patchi)
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{
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const fvPatch& curPatch = patches[patchi];
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if (isA<wallFvPatch>(curPatch))
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{
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forAll(curPatch, facei)
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{
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label faceCelli = curPatch.faceCells()[facei];
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epsilon[faceCelli] /= cellBoundaryFaceCount[faceCelli];
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G[faceCelli] /= cellBoundaryFaceCount[faceCelli];
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cellBoundaryFaceCount[faceCelli] = 1;
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}
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}
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}
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}
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