On 7/23/07, Tim Kr?ger <tim at cevis.uni-bremen.de> 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 Dalc?n --------------- Centro Internacional de M?todos Computacionales en Ingenier?a (CIMEC) Instituto de Desarrollo Tecnol?gico para la Industria Qu?mica (INTEC) Consejo Nacional de Investigaciones Cient?ficas y T?cnicas (CONICET) PTLC - G?emes 3450, (3000) Santa Fe, Argentina Tel/Fax: +54-(0)342-451.1594
