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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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<div dir="ltr"><div dir="ltr">On Mon, Jun 24, 2024 at 10:29 AM Zou, Ling <<a href="mailto:lzou@anl.gov">lzou@anl.gov</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg2183482314160860438">
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<p class="MsoNormal"><span style="font-size:11pt">This is the website I normally refer to<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><a href="https://urldefense.us/v3/__https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/solving.html__;!!G_uCfscf7eWS!atB8LuQrlGQnbi8lXYaGJKrUHYTfhXYVS8-QcBlSPWc_cjEPT8rDhboXFr08Hx6cSDhSTlwO2WEXOpoY6C5F$" target="_blank">https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/solving.html</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">Looks like DASSL is the default solver.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"></span></p></div></div></div></blockquote><div><br></div><div>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.</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg2183482314160860438"><div lang="EN-US" style="word-wrap:break-word"><div class="m_2183482314160860438WordSection1"><p class="MsoNormal"><span style="font-size:11pt">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.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">-Ling<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
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<p class="MsoNormal" style="margin-bottom:12pt"><b><span style="color:black">From:
</span></b><span style="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?<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:1pt;color:white">On Sun, Jun 23, 2024 at 5:</span><span style="font-size:1pt;font-family:Arial,sans-serif;color:white"> </span><span style="font-size:1pt;color:white">04 PM
Zou, Ling via petsc-users <petsc-users@</span><span style="font-size:1pt;font-family:Arial,sans-serif;color:white"> </span><span style="font-size:1pt;color:white">mcs.</span><span style="font-size:1pt;font-family:Arial,sans-serif;color:white"> </span><span style="font-size:1pt;color:white">anl.</span><span style="font-size:1pt;font-family:Arial,sans-serif;color:white"> </span><span style="font-size:1pt;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
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<p class="MsoNormal">On Sun, Jun 23, 2024 at 5:04<span style="font-family:Arial,sans-serif"> </span>PM Zou, Ling via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hi all, I am just curious … any effort trying to include PETSc as Modelica’s solution option?<u></u><u></u></p>
<p class="MsoNormal">(Modelica forum or email list seem to be quite dead so asking here.)<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">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<u></u><u></u></p>
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<p class="MsoNormal">how to interface packages. Do they have documentation on that?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"> Thanks,<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"> Matt<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">-Ling<u></u><u></u></p>
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<p class="MsoNormal"><span class="m_2183482314160860438gmailsignatureprefix">-- </span><u></u><u></u></p>
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<p class="MsoNormal">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener<u></u><u></u></p>
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<p class="MsoNormal"><a href="https://urldefense.us/v3/__http:/www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!e8sA5VFEfZrWzBeykVmuJSprkdGGGySwcvejvOBPvzrBd0qITlSt4aai30icUjLpUqdLPz-LkDNH$" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><u></u><u></u></p>
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</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!atB8LuQrlGQnbi8lXYaGJKrUHYTfhXYVS8-QcBlSPWc_cjEPT8rDhboXFr08Hx6cSDhSTlwO2WEXOjlJYUgi$" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div>