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<p>Yes, Mario, as far I know, VisIt uses linear interpolation and finite difference derivatives so when I look at the vorticity I either use postnek or compute them in usrchk() with, say, comp_vort3() and dump as a separate field sequence with outpost() and
then view them in VisIt</p>
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<p>Aleks</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><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> Tuesday, October 10, 2017 8:52:50 AM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> [Nek5000-users] nek and visit vy trouble</font>
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<div class="PlainText">I'm trying to make some volume integrals of the vorticity in the flow
<br>
domain. I'm considering a two-dimensional plunging flat plate, in the <br>
body frame.<br>
Is it possible that variables accessed in nek, such as vy, are different <br>
from the one displayed in visit?<br>
I mean, in the fld file, and in the usr, vy has a sign, while in visit <br>
has the opposite sign.<br>
Furthemore, exporting the field files in tecplot format and performing <br>
integrations in tecplot, computation goes well.<br>
<br>
What's happening?<br>
<br>
Thank you<br>
<br>
Mario<br>
<br>
-- <br>
Mario Ostieri<br>
<br>
Ph.D. Student<br>
University of Naples Federico II<br>
Department of Industrial Engineering<br>
Piazzale V. Tecchio 80<br>
80125 Napoli, Italy<br>
tel. +390817682184<br>
email: mario.ostieri@unina.it<br>
<br>
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