[vishal3]

DEAR FOAMERS and CODERS,

I am trying to understand the coding part of twoPhaseEulerFoam solver.

In twoPhaseEulerFoam.C file, from line number 79-83:

{
volScalarField contErr1
(
fvc::ddt(alpha1, rho1) + fvc::div(alphaRhoPhi1)
- (fvOptions(alpha1, rho1)&rho1)
);

}

In the above part,

1. the first term ( fvc::ddt(alpha1, rho1)) is solving accumulation term

2. Second part (fvc::div(alphaRhoPhi1)) is solving divergence term

Similar to above two terms, what is the meaning of last term ((fvOptions(alpha1, rho1)&rho1))??? What is the significance of this term??? Can you represent this term mathematically?? What is the effect of this term on solution or convergence????

Also, how does fvOptions work here???


Please guys help me.

Thanking you,