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<p style="margin-top:0;margin-bottom:0">Hi Vatslav,</p>
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<p style="margin-top:0;margin-bottom:0">There is some discussion of mesh deformation here:</p>
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<p style="margin-top:0;margin-bottom:0"><a href="http://nek5000.github.io/NekDoc/geometry.html" id="LPlnk994323" previewremoved="true">http://nek5000.github.io/NekDoc/geometry.html</a><br>
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<p style="margin-top:0;margin-bottom:0">Look for mesh modification.</p>
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<p style="margin-top:0;margin-bottom:0">As long as your transformation is a relatively smooth</p>
<p style="margin-top:0;margin-bottom:0">function of the input geometry, i.e., X' = f(X), where</p>
<p style="margin-top:0;margin-bottom:0">X=(x,y,z) is the input geometry and X'=(x',y',z') is the</p>
<p style="margin-top:0;margin-bottom:0">output geometry, then things are likely to be ok.</p>
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<p style="margin-top:0;margin-bottom:0">A call to fix_geom just before the "return" statement</p>
<p style="margin-top:0;margin-bottom:0">in usrdat2 is often a good idea. That is:</p>
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<p style="margin-top:0;margin-bottom:0"> subroutine usrdat2</p>
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<p style="margin-top:0;margin-bottom:0"> your code here (e.g., following the url above)</p>
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<p style="margin-top:0;margin-bottom:0"> call fix_geom</p>
<p style="margin-top:0;margin-bottom:0"> return</p>
<p style="margin-top:0;margin-bottom:0"> end</p>
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<p style="margin-top:0;margin-bottom:0">Note that the comments about outputting the geometry</p>
<p style="margin-top:0;margin-bottom:0">in the URL above are somewhat dated. Nek5000 always</p>
<p style="margin-top:0;margin-bottom:0">writes the geometry to the first 0.f00001 file, so you don't</p>
<p style="margin-top:0;margin-bottom:0">have to explicitly request to have the geometry written with</p>
<p style="margin-top:0;margin-bottom:0">the other fields (velocity, pressure, temperature...)</p>
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<p style="margin-top:0;margin-bottom:0">hth,</p>
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<p style="margin-top:0;margin-bottom:0">Paul</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nek5000-users <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> Saturday, November 25, 2017 4:04:02 AM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> [Nek5000-users] link between local and global direction</font>
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<div>Hi, Neks!<br>
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What is the principle of creation of link between local ( i, j, k ) in some spectral element and the global coordinate system ( x, y, z ) in sophisticated geometry ?<br>
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And how to find out how does these links changes when I move or rotate the elements ?<br>
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Regards, Vatslav.<br>
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