[linch]

Hi foamers,

I know the "==" operator as an equality operator in C, i.e. (a==b) suppose to return true or false.

But then I can't understand following lines of interFoam:

rho == alpha1*rho1 + (scalar(1) - alpha1)*rho2;

and

solve
        (
            UEqn
         ==
            fvc::reconstruct
            (
                (
                    fvc::interpolate(interface.sigmaK())*fvc::snGrad(alpha1)
                  - ghf*fvc::snGrad(rho)
                  - fvc::snGrad(p_rgh)
                ) * mesh.magSf()
            )
        );

Can you please explain me the meaning of the == operator is these cases? What would be the difference if I would use

rho = alpha1*rho1 + (scalar(1) - alpha1)*rho2;

instead of == for the first one?

Best regards,
Ilya