[sourav8016]

I was wondering about fvc::interpolate(rho) in createFields.H file of interFoam. What actually it does?

// Mass flux
surfaceScalarField rhoPhi
(
IOobject
(
"rhoPhi",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
fvc::interpolate(rho)*phi
);

[Phicau]

Hi Sourav,
It takes the density field at the cells and interpolates it to the faces, so that it can be multiplied by the flux, which is also defined at the faces.

Best,
Pablo