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foam-extend4.1-coherent-io/applications/solvers/overset/interOversetFoam/limitU.H

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{
scalar limitMagU = readScalar(pimple.dict().lookup("limitMagU"));
volScalarField magU(mag(U));
scalar maxMagU = max(magU).value();
Info<< "mag(U): max: " << maxMagU
<< " avg: " << magU.weightedAverage(mesh.V()).value();
if (maxMagU > limitMagU)
{
U.internalField() *=
neg(magU.internalField() - limitMagU)
+ pos(magU.internalField() - limitMagU)*
limitMagU/(magU.internalField() + SMALL);
U.correctBoundaryConditions();
oversetFvPatchVectorField::oversetInterpolate(U); // Overset update
// Note: if implicit fringe is switched on, we are doing the
// interpolation twice (once in correctBoundaryConditions and once in
// oversetInterpolate). Reorganize. VV, 4/Oct/2016.
Info << " ...limiting" << endl;
}
else
{
Info << endl;
}
}