[Nek5000-users] nek and visit vy trouble

[nek5000-users at lists.mcs.anl.gov]

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


Aleks

________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Tuesday, October 10, 2017 8:52:50 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] nek and visit vy trouble

I'm trying to make some volume integrals of the vorticity in the flow
domain. I'm considering a two-dimensional plunging flat plate, in the
body frame.
Is it possible that variables accessed in nek, such as vy, are different
from the one displayed in visit?
I mean, in the fld file, and in the usr, vy has a sign, while in visit
has the opposite sign.
Furthemore, exporting the field files in tecplot format and performing
integrations in tecplot, computation goes well.

What's happening?

Thank you

Mario

--
Mario Ostieri

Ph.D. Student
University of Naples Federico II
Department of Industrial Engineering
Piazzale V. Tecchio 80
80125 Napoli, Italy
tel. +390817682184
email: mario.ostieri at unina.it

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