Edoardo alinovi writes:
> Hello Barry,
>
> Welcome to the party! Thank you guys for your precious suggestions, they
> are really helpful!
>
> It's been a while since I am messing around and I have tested many
> combinations. Schur + selfp is the best preconditioner, it converges within
> 5 iters
Hello Barry,
Welcome to the party! Thank you guys for your precious suggestions, they
are really helpful!
It's been a while since I am messing around and I have tested many
combinations. Schur + selfp is the best preconditioner, it converges within
5 iters using gmres for inner solvers but it is
To expand on what Matt said slightly.
When you have a preconditioner based on (possibly nested) sub solves one
generally "tunes" the solves to minimize time to solution. We recommend doing
this by first using very accurate subsolves (when possible using direct solves
inside); this tells us
On Fri, May 5, 2023 at 5:13 AM Edoardo alinovi
wrote:
> Hi Matt,
>
> I have some more questions on the fieldsplit saga :)
>
> I am running a 1M cell ahmed body case using the following options:
>
> "solver": "fgmres",
> "preconditioner": "fieldsplit",
> "absTol": 1e-6,
>
Hi Matt,
I have some more questions on the fieldsplit saga :)
I am running a 1M cell ahmed body case using the following options:
"solver": "fgmres",
"preconditioner": "fieldsplit",
"absTol": 1e-6,
"relTol": 0.0,
"options":{
"pc_fieldsplit_type": "multiplicative",
On Thu, Apr 20, 2023 at 11:07 AM Edoardo alinovi
wrote:
> Hi Matt,
>
> thanks for sharing the literature.
>
> Would you suggest any monolitic approach for the mpiaij/mpibaij matrix
> instead of fieldsplit?
>
I have not seen them be better, but Vanka-type smoothers can work for this
system.
>
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
On Mon, Apr 17, 2023 at 6:37 AM Edoardo alinovi
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,
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
On Mon, Apr 17, 2023 at 6:16 AM Edoardo alinovi
wrote:
> Do you mean the solver I am messing around? XD
>
Yes, and what physics it is targeting.
THanks,
Matt
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results
Do you mean the solver I am messing around? XD
On Mon, Apr 17, 2023 at 6:09 AM Edoardo alinovi
wrote:
> Thanks Matt, your always there when you need <3
>
Glad it's working! Sometime you have to tell me what it is solving.
Thanks,
Matt
--
What most experimenters take for granted before they begin their
experiments is infinitely
Thanks Matt, your always there when you need <3
Aaah yes you are right. Do not ask me why, but I was not getting this with
3.18.5, odd.
On Mon, Apr 17, 2023 at 6:00 AM Edoardo alinovi
wrote:
> Hey Matt,
>
> Thanks for the help. Here is the error:
>
> [0]PETSC ERROR: - Error Message
> --
> [0]PETSC ERROR: Object is in wrong state
> [0]PETSC ERROR: Not
Hey Matt,
Thanks for the help. Here is the error:
[0]PETSC ERROR: - Error Message
--
[0]PETSC ERROR: Object is in wrong state
[0]PETSC ERROR: Not for unassembled vector, did you call
On Mon, Apr 17, 2023 at 5:36 AM Edoardo alinovi
wrote:
> Hello Barry, Matt, Jed,
>
> I have just installed the latest and greatest version of petsc and I am
> hitting a problem I did not have in previous releases.
>
> Here is the error:
>
>
>
>
> *[1]PETSC ERROR: - Error
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