<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, May 21, 2014 at 10:21 PM, Adrian Croucher <span dir="ltr"><<a href="mailto:a.croucher@auckland.ac.nz" target="_blank">a.croucher@auckland.ac.nz</a>></span> wrote:<br>
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hi<br>
<br>
<div>On 21/05/14 22:43, Matthew Knepley
wrote:<br>
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<div class="gmail_quote">On Wed, May 21, 2014 at 12:46 AM, Jed
Brown <span dir="ltr"><<a href="mailto:jed@jedbrown.org" target="_blank">jed@jedbrown.org</a>></span>
wrote:<br>
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<div>Adrian Croucher <<a href="mailto:a.croucher@auckland.ac.nz" target="_blank">a.croucher@auckland.ac.nz</a>>
writes:<br>
> In the 'PhysicsCreate' functions there are calls to
DMPlexAddBoundary(),<br>
> which takes an array of IDs; e.g. in
PhysicsCreate_SW() the IDs are<br>
> {100,101,200,300}. It looks like these IDs define
where the BCs are<br>
> applied, but what do these numbers actually refer
to?<br>
<br>
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They are numbered "face sets" on the Cubit-generated
example mesh.<br>
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<br>
1) Cubit has a notion of Face Set, which are groups of faces
in the mesh</div>
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<div class="gmail_extra">2) These sets are written out as Face
Sets in the ExodusII format</div>
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<div class="gmail_extra">3) PETSc reads in the ExodusII format
and creates a label names Face Sets,</div>
<div class="gmail_extra"> where the value is the set label
(like 101) and the points are the set members.</div>
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<br>
Right, thanks very much for explaining that. I had been looking in
the code to see where those Face Sets label values were being set
up- hadn't realised they were in the mesh file...<br></div></blockquote><div><br></div><div>You can see me setting up similar labels in DMPlexCreateSquareMesh() for example.</div><div><br></div><div> Matt</div>
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Cheers, Adrian<span class="HOEnZb"><font color="#888888"><br>
<pre cols="72">--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
University of Auckland, New Zealand
email: <a href="mailto:a.croucher@auckland.ac.nz" target="_blank">a.croucher@auckland.ac.nz</a>
tel: <a href="tel:%2B64%20%280%299%20923%204611" value="+6499234611" target="_blank">+64 (0)9 923 4611</a>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>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
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