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Re: KSP/PC choice
- To: petsc-users@xxxxxxxxxxx
- Subject: Re: KSP/PC choice
- From: "Lisandro Dalcin" <dalcinl@xxxxxxxxx>
- Date: Mon, 23 Jul 2007 11:20:42 -0300
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- Reply-to: petsc-users@xxxxxxxxxxx
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On 7/23/07, Tim Kröger <tim@xxxxxxxxxxxxxxxxxxx> wrote:
Dear all,
the more KSP and PC methods are available, the more difficult it is to
choose a suitable one.
I want to compute Navier-Stokes (using Finite Elements) for
medium-sized Reynolds numbers (still laminar, though). I am currently
using
Are you solving incompresible flow? Tansient or steady state? Are you
using a monolithic formulation; or a fractional-step like formulation?
What kind of stabilization for advection and pressure are you using?
I ask this because in my experience incompressible flows with
monolithic formulations are usually hard to solve, and a good choice
of stabilization method not only leads to better final solution, but
also lead to linear systems with better conditioning.
--
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
PTLC - Güemes 3450, (3000) Santa Fe, Argentina
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