[fisch]

Hello,

i try to understand the equations for the k-epsilon turb model.
the equation for k is:
tmp<fvScalarMatrix> kEqn
(
fvm::ddt(k_)
+ fvm::div(phi_, k_)
- fvm::Sp(fvc::div(phi_), k_)
- fvm::laplacian(DkEff(), k_)
==
G
- fvm::Sp(epsilon_/k_, k_)
);

i understand all terms except the second and the third...
As far as i get it these terms should represent div(k*phi)
But how can
+ fvm::div(phi_, k_) - fvm::Sp(fvc::div(phi_), k_) == div(k*phi) ???



Thanks for any advice,
rupert