It's Finite Volume, co-located grid arrangement, stabilized, with a continuous pressure field at CFL numbers < 1 (typically 0.3-0.7). Which pre-conditioner would you recommend with CG solvers (BiCGStab) for that sort of problem?
________________________________________ From: five9a2 at gmail.com [five9a2 at gmail.com] On Behalf Of Jed Brown [[email protected]] Sent: 14 April 2011 19:16 To: Denner, Fabian Cc: PETSc users list Subject: Re: [petsc-users] Pre-conditioner for parallel CFD simulation On Thu, Apr 14, 2011 at 20:05, Denner, Fabian <f.denner09 at imperial.ac.uk<mailto:f.denner09 at imperial.ac.uk>> wrote: I solve fully implicit, incompressible DNS of low/moderate Reynolds number (Re = 1 - 1000) flows. The hexahedral meshes to test the code have an aspect ration of 1, the tetrahedral meshes are Voronoi-based, do not have high aspect ratios and a good quality. Finite element? Inf-sup stable or stabilized? Continuous or discontinuous pressure? This email from last week is relevant http://lists.mcs.anl.gov/pipermail/petsc-users/2011-April/008475.html Coupled multigrid takes some work, you can do algebraic multigrid with PCFieldSplit with relatively little effort. What CFL are you running at?
