33 lines
1.3 KiB
C
33 lines
1.3 KiB
C
{
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forAll(mesh.boundary(), patchID)
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{
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if(U.boundaryField()[patchID].type()
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== solidDirectionMixedFvPatchVectorField::typeName
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)
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{
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solidDirectionMixedFvPatchVectorField& loadingPatch =
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refCast<solidDirectionMixedFvPatchVectorField>
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(
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U.boundaryField()[patchID]
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);
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tensorField Finv = inv(I + gradU);
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vectorField newN = Finv & n.boundaryField()[patchID];
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newN /= mag(newN);
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loadingPatch.valueFraction() = sqr(newN);
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//- set gradient
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loadingPatch.refGrad() =
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(
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//Traction
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( (mu.boundaryField()[patchID] + lambda.boundaryField()[patchID]) * (n.boundaryField()[patchID] & gradU.boundaryField()[patchID]) )
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- ( mu.boundaryField()[patchID] * (n.boundaryField()[patchID] & gradU.boundaryField()[patchID].T()) )
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- ( mu.boundaryField()[patchID] * ( n.boundaryField()[patchID] & (gradU.boundaryField()[patchID] & gradU.boundaryField()[patchID].T()) ) )
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- ( lambda.boundaryField()[patchID] * tr(gradU.boundaryField()[patchID]) * n.boundaryField()[patchID] )
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- ( 0.5 * lambda.boundaryField()[patchID] * tr(gradU.boundaryField()[patchID] & gradU.boundaryField()[patchID].T()) * n.boundaryField()[patchID] )
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)
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/
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(2.0*mu.boundaryField()[patchID] + lambda.boundaryField()[patchID]);
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}
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}
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}
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