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<p class="MsoNormal"><span style="font-size:11.0pt">Thank you, Matt.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">-Ling<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">From:
</span></b><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">Matthew Knepley <knepley@gmail.com><br>
<b>Date: </b>Monday, June 24, 2024 at 10:39 AM<br>
<b>To: </b>Zou, Ling <lzou@anl.gov><br>
<b>Cc: </b>petsc-users@mcs.anl.gov <petsc-users@mcs.anl.gov><br>
<b>Subject: </b>Re: [petsc-users] Modelica + PETSc?<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">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 <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">On Mon, Jun 24, 2024 at 10:29 AM Zou, Ling <<a href="mailto:lzou@anl.gov">lzou@anl.gov</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">This is the website I normally refer to<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"><a href="https://urldefense.us/v3/__https:/openmodelica.org/doc/OpenModelicaUsersGuide/latest/solving.html__;!!G_uCfscf7eWS!doiyv6M6Kq1yjfPlFl-d2a7UjPqQJrGEcmX3w1EMUGxL-E2amOHtj5Yzx2B45uASg6yoOJ104QRL$" target="_blank">https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/solving.html</a><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Looks like DASSL is the default solver.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"> Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"> Matt<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">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.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">-Ling<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><b><span style="font-size:11.0pt;color:black">From:
</span></b><span style="font-size:11.0pt;color:black">Matthew Knepley <<a href="mailto:knepley@gmail.com" target="_blank">knepley@gmail.com</a>><br>
<b>Date: </b>Monday, June 24, 2024 at 6:12 AM<br>
<b>To: </b>Zou, Ling <<a href="mailto:lzou@anl.gov" target="_blank">lzou@anl.gov</a>><br>
<b>Cc: </b><a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a> <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br>
<b>Subject: </b>Re: [petsc-users] Modelica + PETSc?</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:1.0pt;color:white">On Sun, Jun 23, 2024 at 5:</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">04
PM Zou, Ling via petsc-users <petsc-users@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">mcs.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">anl.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">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
</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">On Sun, Jun 23, 2024 at 5:04</span><span style="font-size:11.0pt;font-family:"Arial",sans-serif"> </span><span style="font-size:11.0pt">PM Zou, Ling
via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Hi all, I am just curious … any effort trying to include PETSc as Modelica’s solution option?<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">(Modelica forum or email list seem to be quite dead so asking here.)<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">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<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">how to interface packages. Do they have documentation on that?<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> Matt<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">-Ling<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments
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-- Norbert Wiener<o:p></o:p></span></p>
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