Multigrid and Turbulence
I implemented a nonlinear Multigrid in my FV block-structured Code with SIMPLE as Smoother. It speeds up the convergence rate amazingly for laminar flow. However, for the turbulent transport equations (k and eps ; segregated approach in the solver) it does not work. I am not quite sure what to to with the boundary conditions (Wall function; low-Reynolds) and with the sources on the higher grid levels. Can someone give me a hint or recommand some good literature? I am sure that I am not the first one who has have these problems in the past. Thank you very much in advance !
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