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

[Jed Brown]

On Thu, Apr 14, 2011 at 20:05, Denner, Fabian <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?
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