[petsc-users] replacing Schur complement in pcfieldsplit

[Klaij, Christiaan]

In order to implement SIMPLE-type preconditioners for the
incompressible Navier-Stokes equations (Elman e.a. JCP 227, 2008)
using the PCFieldSplit framework, it looks like I need to replace
inv(A00) by some cheap approximation

1) in the Schur complement
2) in the L and/or U of the LDU factorization
3) while keeping A00 in the D

What would be the best way?


dr. ir. Christiaan Klaij
CFD Researcher
Research & Development
E mailto:C.Klaij at marin.nl
T +31 317 49 33 44

MARIN
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