[bojiezhang]

HI every former:
I have a problem about equation. Now I have a equation like this:
fvVectorMatrix UEqn
(
fvm::ddt(rho, U)
+ fvm::div(rhoPhi, U)
- (add)
);
the function for "add" in the () is like this:
for X dirction: add(x)=x ; fro Y dirction: add(y)=u.component(y)*y; for Z dirction add(z)=0;
how can add for this? I really hope someone can heip me. Thank you in davance!

bojie zhang

[nimasam]

first declare a volVectorField add variable, then loop over it and fill it with your values.

forAll (add , celli)
{
add[celli] = vector (mesh.C()[celli].x() ,U[celli].y(),0.0);

}

then add it in your Eqn.

fvVectorMatrix UEqn
(
fvm::ddt(rho, U)
+ fvm::div(rhoPhi, U)
- (add)
);

of course i didn't have checked it, but its the general idea

[bojiezhang]

Thank you very much! I will try it right now!