foam-extend4.1-coherent-io/applications/solvers/solidMechanics/elasticPlasticNonLinULSolidFoam/readDivDSigmaExpMethod.H

//-  the method used to calculate the explicit component of sigma
word divDSigmaExpMethod(mesh.solutionDict().subDict("stressedFoam").lookup("divDSigmaExp"));
Info << "Calculation of divDSigmaExp method: " << divDSigmaExpMethod << endl;
if
(
    divDSigmaExpMethod != "standard"
  && divDSigmaExpMethod != "surface"
  && divDSigmaExpMethod != "decompose"
  && divDSigmaExpMethod != "laplacian"
)
{
    FatalError << "divDSigmaExp method " << divDSigmaExpMethod << " not found!" << nl
        << "valid methods are:\nstandard\nsurface\ndecompose\nlaplacian"
        << exit(FatalError);
}