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On Fri, Feb 23, 2024 at 5: 14 PM MIGUEL MOLINOS PEREZ <mmolinos@ us. es> wrote: Dear all, I am struggling on how to include ghost points in DMSwarm local vectors. According to PETSc documentation it seems “straightforward” for a DMDA mesh.
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<div dir="ltr"><div dir="ltr">On Fri, Feb 23, 2024 at 5:14 PM MIGUEL MOLINOS PEREZ <<a href="mailto:mmolinos@us.es">mmolinos@us.es</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="msg-7512293070622100317">
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Dear all, I am struggling on how to include ghost points in DMSwarm local vectors. According to PETSc documentation it seems “straightforward” for a DMDA mesh. However, I am not so sure on how to do it for a DMSwarm. In fact, if I add the result
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Dear all,
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<div>I am struggling on how to include ghost points in DMSwarm local vectors. According to PETSc documentation it seems “straightforward” for a DMDA mesh. However, I am not so sure on how to do it for a <span style="color:rgb(0,0,0)">DMSwarm.
In fact, if I add the result of </span><span style="color:rgb(99,99,36);font-family:Menlo,Monaco,"Courier New",monospace;white-space:pre-wrap;background-color:rgb(255,255,255)">DMSwarmGetLocalSize
</span><font color="#000000">for each rank, the result is the <span>
exact</span> number of particles in the system. Which means that the halo is zero. </font></div>
<div><span style="color:rgb(0,0,0)"><br>
</span></div>
<div><span style="color:rgb(0,0,0)">S</span><font color="#000000">ince there is a function called </font><span style="color:rgb(99,99,36);font-family:Menlo,Monaco,"Courier New",monospace;white-space:pre-wrap;background-color:rgb(255,255,255)">DMSwarmCreateLocalVectorFromField,</span><span style="color:rgb(0,0,0)">I
was wandering if there is a function already implemented in </span><font color="#000000">petsc (and I’m missing it) to </font><span style="color:rgb(0,0,0)">include ghost points </span><span style="color:rgb(0,0,0)">in
DMSwarm</span><span style="color:rgb(0,0,0)"> and therefore don’t have to reinvent the wheel. If so, is there any example out there I can follow?</span></div></div></div></div></div></div></blockquote><div><br></div><div>DMSwarm is currently different from the other DMs. There is no idea of identity for particles, so there is no idea of a shared particle. You can create this by adding an ID to your particle fields, but it would be a manual process. DMSwarmMigrate() can duplicate particles if you have an overlapping mesh, which would mimic shared particles.</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="msg-7512293070622100317"><div><div><div dir="auto"><div dir="auto">
<div>Thanks in advance.</div>
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<div>Regards,</div>
<div>Miguel<br>
<br>
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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!aLpar0ltcRArMpZIgCFcyKDnezb9G3tPzvVdBNtiSHZD2-37Vdmfl-Kp4YrSLNP7wO3gZjhPcXCq2A0-7EQT$" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div>