PETSc+Hypre
Hi
Is there any one having experience of using HYPRE as a preconditioner for PETSc KSP solvers? Please guide me through installation, ... Best Regards Soheyl 
Re: PETSc+Hypre
Yes, I just installed PETSc2.2.1 and Hypre on our cluster and the process is straight forward. I assume you have a BLAS a LAPACK and some sort of MPI already installed on your system, than adding PETSc to it is fairly simple, since PETSc comes with a very advanced configure Python script.
just use something like: ./config/configure.py downloadhypre=ifneeded in the PETSc source dir and of course check all the othe roptions you have with this script. If you don't have BLAS,LAPACK and some MPI than PETSc can also take care of that but I never tried that, I prefer to build them manual, specially BLAS, where I use the ATLAS package to optimize the BLAS lib for the system, also easy to install hope I could help alexice 
Boomeramg Options
Hi Thanks alot, because I finally set up PETSc with hypre support.
I want to use the Boomeramg (The Algebraic Multigrid Preconditioner) of Hypre to solve a problem in CFD (fully implicit N.S.). Do you have any experience using Boomeramg? What options are useful to experience? Best Regards Soheyl 
Re: Boomeramg Options
Sorry to say, I do not use the Boomeramg in Hyre. I use the Pilut for my problems, which are glaciers.
I hope somebody out there can help. anyway good luck with your model alexice 
Re: Boomeramg Options
Does anyone has previous experiences in using PETSc to solve Poisson equation (or incompressible NS) with multigrid.

petsc and multigrid
Does anyone has previous experiences in using PETSc to solve 3D FEA with multigrid? Whether or not the multigrid is petsc' or external software?

AMG for implicit NavierStokes
Quote:
If you are solving 3D problems using BoomerAMG and having memory issues, try these options http://lists.mcs.anl.gov/pipermail/p...ry/000001.html 
How do you utilize hypre as a PC of PETSc KSP? Is it necessary to modify original program, or only utilize PETSc's runtime option?

Quote:
Code:
downloadhypre Code:
pc_type hypre 
My problem lies in moving flapping airfoil, incompressible flow using fractional step and structured grid. i've managed to use PETSc and hypre to solve my problem.
For the momentum eqn, I use KSP BCGS. For the poisson eqn, it's faster to use BoomerAMG under PETSc. Or better still, if it's structured grid, you can also use hypre standalone and use its solvers like SMG etc. It's even faster. Hope it helps. 
Thank you!
Beause I need solve eigenvalue,I will try SLEPc package!Hope you can help me! Thank you again! 
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 isn't very useful. If you insist on naming just one, name the preconditioner.
If you have a structured grid, you can use PETSc's DMMG which may be faster than SMG and is definitely more flexible. 
AMG using Hypre
Dear Soheil,
Please tell us about your experience of using hypre for AMG. Did you use it for momentum equation as well? I thaught you use it for CFD. Kind Regards, Farshad Quote:

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