[petsc-users] Fwd: Questions using PCFIELDSPLIT

Hi all, I'm trying to play with PCFIELDSPLIT, but after reading I'm still confused interpreting the monitors. I'm trying to solve a Stokes problem [ AB^t ] M = [ ] [ B0 ] My first question is about the MINRES behaviour with pcfieldsplit. My options

Re: [petsc-users] Fwd: Questions using PCFIELDSPLIT

2013/12/14 Jed Brown jedbr...@mcs.anl.gov: Adriano Côrtes adrimacor...@gmail.com writes: Hi all, I'm trying to play with PCFIELDSPLIT, but after reading I'm still confused interpreting the monitors. I'm trying to solve a Stokes problem [ AB^t ] M

Re: [petsc-users] Fwd: Questions using PCFIELDSPLIT

2013/12/14 Jed Brown jedbr...@mcs.anl.gov Adriano Côrtes adrimacor...@gmail.com writes: 2013/12/14 Jed Brown jedbr...@mcs.anl.gov: Adriano Côrtes adrimacor...@gmail.com writes: Use -ksp_view to check that these are being used. I recommend setting all these options using run-time

Re: [petsc-users] Fwd: Questions using PCFIELDSPLIT

solve converged due to CONVERGED_RTOL iterations XXX Can you help interpret those behaviors? Any clue? Thanks again. Adriano. 2013/12/14 Jed Brown jedbr...@mcs.anl.gov Adriano Côrtes adrimacor...@gmail.com writes: 2013/12/14 Jed Brown jedbr...@mcs.anl.gov See that fieldsplit_p_ uses

[petsc-users] MINRES and PCFIELDSPLIT

Hi all, I'm still trying to make MINRES and PCFIELDSPLIT working together in my code, but I am not understanding how things are going. Ok, first of all, I'm trying to solve a Stokes problem with an inf-sup stable element with all boundary of Dirichlet type, that is, my system is [ A B^t

[petsc-users] ASM for Saddle-point problems

Dear all, I'm solving a saddle-point problem coming from a 2d stokes problem discretized by an inf-sup stable mixed element. By now I'm playing in serial, because I want to understand the behavior of the solver. I have the whole matrix assembled in memory. After playing with GMRES and ILU with

[petsc-users] Dump a matrix to a .py file

Dear all, I'm on a debugging process, and I'd like to know if there is a way of using PetscViewer to dump Mat and Vec objects to a .py file, to be load and manipulated with numpy/scipy to inspect some properties. Many thanks in advance. Adriano. -- Adriano Côrtes

[petsc-users] SNES ex12 visualization

hint of how to fix it and have the visualization working? Best regards, Adriano. -- Adriano Côrtes = *Campus Duque de Caxias and* *High-performance Computing Center (NACAD/COPPE)* Federal University of Rio de Janeiro (UFRJ)

Re: [petsc-users] SNES ex12 visualization

of the distributed dmplex? Is there a way to output one .h5 per mesh partition? Best regards, Adriano. 2017-09-14 12:00 GMT-03:00 Matthew Knepley <knep...@gmail.com>: > On Thu, Sep 14, 2017 at 10:30 AM, Adriano Côrtes <adrimacor...@gmail.com> > wrote: > >> Dear all, >> >&