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Dear PETSc team:<br>
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I am working on an FEA code that solves the elasticity equation using P1 elements. I want to write Vecs to ParaView in .vtk format. I can output the displacements by defining a PetscSection that assigned dof over the vertices of my mesh. I can export this Vec
using PetscViewerVTKAddField() and DMPlexVTKWriteAll(). Now I want to export strains and stresses using the same VTK functions, but these Vecs need a different PetscSection (one that assigns dof over the cells). My concern is that to output displacements I
attached the PetscSection to the DMPlex using DMSetLocalSection(). I'm not sure if I can define another local section for my cell-based strains and stresses and set it as a local section .
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My questions are:</div>
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<ul>
<li>Could I perhaps do this with DMSetGlobalSection()?<br>
<span></span></li><li><span>Can a DM hold multiple PetscSections (say multiple local sections and multiple global sections)?</span></li><ul>
<li><span>If so, how can select individual ones to properly output Vecs with DMPlexVTKWriteAll()?<br>
</span></li></ul>
<li><span>Does the local PetscSection depend on the Global one or vice versa? </span></li><li><span>Can I avoid having to define a PetscSection altogether for my cell-based Vecs if I use DMCreateGlobalVector()?</span></li><ul>
<li><span>I got this idea from the source code of DMPlexCreateRankField(), which I successfully use to visualize my mesh partition.<br>
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Sorry for the mouthful. <br>
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<span style="margin: 0px; color: black; font-family: "Times New Roman", Times, serif; font-size: 12pt;">Sincerely:</span></p>
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<span style="margin: 0px; color: red; font-family: "Courier New", monospace; font-size: 14pt;"><b style=""><span style="font-family: "Courier New", monospace;">J.A. Ferrand</span></b></span><u><span style="margin: 0px; color: red; font-family: "Swis721 BlkCn BT", sans-serif; font-size: 12pt;"></span></u></p>
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<span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;">Embry-Riddle Aeronautical University - Daytona Beach FL</span></p>
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<span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;">M.Sc. Aerospace Engineering | May 2022</span></p>
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<span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;">B.Sc. Aerospace Engineering</span></p>
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<span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;">B.Sc. Computational Mathematics</span></p>
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<span style="margin: 0px; color: rgb(0, 0, 0); font-family: Courant; font-size: 12pt;"> </span></p>
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<span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;"><span style="color: rgb(0, 0, 0); font-family: Courant; font-size: 12pt; display: inline !important; font-size-adjust: none; background-color: rgb(255, 255, 255);">Sigma Gamma Tau</span><span style="color: rgb(0, 0, 0); font-family: Courant; font-size: 12pt; display: inline !important; font-size-adjust: none; background-color: rgb(255, 255, 255);"> </span><br>
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<span style="margin: 0px; color: rgb(0, 0, 0); font-family: Courant; font-size: 12pt;">Tau Beta Pi</span></p>
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<u><span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;">Phone:</span></u><span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;"> (386)-843-1829</span></p>
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<u><span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;">Email(s):</span></u><span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;"> ferranj2@my.erau.edu</span></p>
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<span style="margin: 0px; color: black; font-family: Courant; font-size: 12pt;"><span style="margin:0px">
</span>jesus.ferrand@gmail.com</span></p>
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