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Forum: Main CFD Forum

March 25, 2009, 05:24

Replies: 12

PETSc+Hypre

Views: 8,290

Posted By jed

Sorry for being pedantic, but you must be using...

Sorry for being pedantic, but you must be using BCGS with some preconditioner for the momentum equation and some Krylov method with BoomerAMG for the Poisson equation. Naming one without the other...

Forum: Main CFD Forum

March 24, 2009, 11:15

Replies: 12

PETSc+Hypre

Views: 8,290

Posted By jed

Configure PETSc with --download-hypre (or give...

Configure PETSc with --download-hypre (or give path to your already installed version) and run with -pc_type hypre

It is really rare that you have to modify code when you change preconditioners...

Forum: Main CFD Forum

March 24, 2009, 06:56

Replies: 12

PETSc+Hypre

Views: 8,290

Posted By jed

AMG for implicit Navier-Stokes

If you are solving compressible flow, multigrid might work fine, but for incompressible flow, your matrix will be indefinite. No black-box preconditioners (short of a direct solve) work well for...

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