[petsc-users] Modelica + PETSc?

[Zou, Ling]

Thank you, Matt.
To clarify, I myself have no idea about the Modelica implementation/interface to solver, so I was looking for if any such efforts have been done so I could leverage them.
-Ling

From: Matthew Knepley <knepley at gmail.com>
Date: Monday, June 24, 2024 at 10:39 AM
To: Zou, Ling <lzou at anl.gov>
Cc: petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] Modelica + PETSc?
On Mon, Jun 24, 2024 at 10: 29 AM Zou, Ling <lzou@ anl. gov> wrote: This is the website I normally refer to https: //openmodelica. org/doc/OpenModelicaUsersGuide/latest/solving. html Looks like DASSL is the default solver. That is what I would
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On Mon, Jun 24, 2024 at 10:29 AM Zou, Ling <lzou at anl.gov<mailto:lzou at anl.gov>> wrote:
This is the website I normally refer to
https://urldefense.us/v3/__https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/solving.html__;!!G_uCfscf7eWS!b_FUpA47GE22L7gOjpyjA0Ai96NvB4NYNw5JB70nNxxDMc5mzM2GtVbJGudJTvPG5-8IFcltmTx9uq9Tni4$ <https://urldefense.us/v3/__https:/openmodelica.org/doc/OpenModelicaUsersGuide/latest/solving.html__;!!G_uCfscf7eWS!doiyv6M6Kq1yjfPlFl-d2a7UjPqQJrGEcmX3w1EMUGxL-E2amOHtj5Yzx2B45uASg6yoOJ104QRL$>

Looks like DASSL is the default solver.

That is what I would have guessed. DASSL is a good solver, but quite dated. I think PETSc can solve those problems, and more scalably. We would be happy to give advice on conforming to their interface.

  Thanks,

    Matt

PS: I was playing with Modelica with some toy problem I have, which solves fine but could not hold on with the steady-state solution for some reason. Maybe I did it wrong, or maybe I am not familiar with the solver. That was the reason of the Modelica+PETSc question since I am quite familiar with PETSc. Also, the combination seems to be a powerful pair.

-Ling

From: Matthew Knepley <knepley at gmail.com<mailto:knepley at gmail.com>>
Date: Monday, June 24, 2024 at 6:12 AM
To: Zou, Ling <lzou at anl.gov<mailto:lzou at anl.gov>>
Cc: petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov> <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>>
Subject: Re: [petsc-users] Modelica + PETSc?
On Sun, Jun 23, 2024 at 5: 04 PM Zou, Ling via petsc-users <petsc-users@ mcs. anl. gov> wrote: Hi all, I am just curious … any effort trying to include PETSc as Modelica’s solution option? (Modelica forum or email list seem to be quite dead
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On Sun, Jun 23, 2024 at 5:04 PM Zou, Ling via petsc-users <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>> wrote:
Hi all, I am just curious … any effort trying to include PETSc as Modelica’s solution option?
(Modelica forum or email list seem to be quite dead so asking here.)

I had not heard of it before. I looked at the 3.6 specification, but it did not sy how the generated DAE were solved, or
how to interface packages. Do they have documentation on that?

  Thanks,

    Matt


-Ling


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