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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 12pt;">Hi Friedrich,
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<div>Nek-MOAB implementation does not support periodic BCs since it was envisioned to work on Cubit meshes but Cubit could not guarantee exactly the same element face layout for the two boundaries so the grid point-to-gridpoint periodicity was impossible to
implement. Could you use an inlet and outlet BC instead?</div>
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<div>Aleks</div>
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<div id="divRpF711137" style="direction: ltr;"><font face="Tahoma" size="2" color="#000000"><b>From:</b> nek5000-users-bounces@lists.mcs.anl.gov [nek5000-users-bounces@lists.mcs.anl.gov] on behalf of nek5000-users@lists.mcs.anl.gov [nek5000-users@lists.mcs.anl.gov]<br>
<b>Sent:</b> Tuesday, October 21, 2014 10:23 AM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> [Nek5000-users] Periodic Boundary Definition<br>
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<p>Hi All,</p>
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<p>When using nek/moab how are the periodic boundaries to be defined?</p>
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<p>Currently I have this:</p>
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<p><em>channel.h5m<br>
1 0 1 fluid set, 0 other/solid sets<br>
10 fluid set #10, solid sets #0<br>
1 Material properties -fluid set #100: MATINDX of 1, All elements: IMATIE = 1<br>
6 no. bc sets; bc set id, bc type: (f=flux, c=convective, t=dirichlet, I=adiabatic)<br>
100 1 P ,<br>
200 1 P ,<br>
300 1 W ,<br>
400 1 W ,<br>
500 1 P ,<br>
600 1 P ,</em></p>
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<p>Boundaries 100 and 200 need to be defined periodic with one another...</p>
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<p>I have experimented with:</p>
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<p><em>100 1 P ,</em> 200 1<br>
<em>200 1 P ,</em> 100 1</p>
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<p>and</p>
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<p><em>100 1 200 1 P ,</em><br>
<em>200 1 100 1 P ,</em><br>
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<p>Neither of which works, is there another implementation or is periodic boundary not possible?</p>
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<p>Thanks, Friedrich.<br>
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