26 lines
688 B
C
26 lines
688 B
C
if(divDSigmaNonLinExpMethod == "standard")
|
|
{
|
|
divDSigmaNonLinExp = fvc::div
|
|
(
|
|
( mu * (gradDU & gradDU.T()) )
|
|
+ ( 0.5 * lambda * tr(gradDU & gradDU.T()) * I )
|
|
+ ( (sigma + DSigma) & gradDU ),
|
|
"div(sigma)"
|
|
);
|
|
}
|
|
else if(divDSigmaNonLinExpMethod == "surface")
|
|
{
|
|
divDSigmaNonLinExp =
|
|
fvc::div(
|
|
mesh.magSf()
|
|
*(
|
|
( muf * (n & fvc::interpolate( gradDU & gradDU.T() )) )
|
|
+ ( 0.5*lambdaf * (n * tr(fvc::interpolate( gradDU & gradDU.T() ))) )
|
|
+ (n & fvc::interpolate( (sigma + DSigma) & gradDU ))
|
|
)
|
|
);
|
|
}
|
|
else
|
|
{
|
|
FatalError << "divDSigmaExp method " << divDSigmaExpMethod << " not found!" << endl;
|
|
}
|