[Thilo]

Hi everyone!

I have a nonlinear set of equations of an acoustic velocity and density which are defined as:

fvVectorMatrix aUEqn
(
fvm::ddt(aU)
+ fvm::div(ac_phi,aU)
);

and

fvScalarMatrix aRhoEqn
(
fvm::ddt(aRho)
+ fvc::div(aU)
);

with

ac_phi = (fvc::interpolate(aRho * U) & mesh.Sf());

Can someone please tell me how I can iterate the solution to a final minimal residual of all variables?

Thank you very much in advanced,

Thilo