Concerning a general CFD unstructured grid case, what is the most efficient matrix solver so far or in the near future that can solve the matrix really fast with thousands of CPUs.
I am using OpenFOAM to do the simulation of incompressible flow. It uses OpenMPI to run the parallel jobs. The simulation is 2D or 3D, and uses a finite volume discretization. I'd like to run very large case studies, with around 10 million to 1 billion grid points. For these case studies, I need the solution over a long time interval.