Conjugate gradient solver for pressure.
 

Hi,

Does anyone know how effective a Conjugate Gradient solver for pressure correction is when used in flows with large density variations (accompanied with large velocity changes to ensure conservation) particularly when the changes are very rapid. i.e, across a few cells.

My preconditioned (incomplete cholesky decomposition) CG-Solver is by Van Der Vorst.

My CG-Solver is not converging at each time step for this case. Is there another solver which can deal effectively with this? Any comments are most welcome.