Hi Matt, thanks for sharing the literature. Would you suggest any monolitic approach for the mpiaij/mpibaij matrix instead of fieldsplit? I did some blind search using gamg/hypre and they look terribile. I guess i am missing a trick, probaly they are not the way to go? Thanks! Il Lun 17 Apr 2023, 13:50 Matthew Knepley <[email protected]> ha scritto:
On Mon, Apr 17, 2023 at 6:37 AM Edoardo alinovi <[email protected]> wrote:
Sure thing, the solver I am working on is this one: https://gitlab.com/alie89/flubio-code-fvm.
It is a 3D, collocated, unstructured, finite volume solver for incompressibility NS. I can run steady, unsteady and I can use SIMPLE, PISO and Factional step method (both explicit and fully implicit momentum). I can also solve for turbulence (k-omega, BSL, SST, Spalart-Allmars, LES). I have also implemented some kind of Immersed boundary (2D/3D) that I need to resume at some point.
Hot topic of the moment, I am developing a fully coupled pressure based solver using field-split. What I have now is working ok, I have validated it on a lot of 2D problems and going on with 3D right now. If all the tests are passed, I'll focus on tuning the field splitting which looks to be a quite interesting topic!
I think a very good discussion of the issues from the point of view of FEM is
https://arxiv.org/abs/1810.03315
There should be a similar analysis from the FVM side, although it might not be possible to find a pressure discretization compatible with the FVM velocity for this purpose.
Thanks,
Matt
Flubio is a project I have been carrying on since PhD days. The implementation is 99% on my shoulders, despite the fact I am collaborating with some people around. I am coding evenings and weekends/free time, it gives me a lot of satisfaction and also a lot of insights!
-- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener
https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>