[petsc-users] Pre-conditioner for parallel CFD simulation

[Denner, Fabian]

Hi,

I have a question concerning pre-conditioner/solver pairs for CFD. I'm using the BiCGStab solver with a Jacobi pre-conditioner at present to perform parallel simulations of fluid flow on unstructured grids. It works, however, for large meshes (>100k elements) the solver doesn't scale very well in terms of necessary iterations to reach a certain tolerance.
Does anybody have experience on which pre-conditioner works best for parallel CFD simulations using the BiCGStab solver? How is the convergence and stability of the multigrid solver compared to BiCGStab?

Best regards,
Fabian