Thanks Paul and Josh,<br><br>I shall start by making the modification in the rea file and trying visit 2.3.2<br><br>Regards,<br>Pradeep<br><br><div class="gmail_quote">On Wed, Feb 15, 2012 at 9:39 AM, <span dir="ltr"><<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Pradeep,<br>
<br>
Which version of Visit are you using? We have experienced similar<br>
issues with version 2.4 when viewing 2D meshes. If this is the case,<br>
try using 2.3.2 and see if you have the same problem.<br>
<br>
Josh<br>
<div class="HOEnZb"><div class="h5"><br>
On Tue, Feb 14, 2012 at 8:08 AM, <<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> wrote:<br>
> Hi Neks,<br>
><br>
> I'm trying to simulate 2D flow over an oscillating cylinder using moving<br>
> mesh, and tried to set up a test case by looking at the peris example. I<br>
> however am getting vanishing Jacobians after the first few timesteps.<br>
><br>
> I am modifying the the boundary velocity of the cylinder in userbc instead<br>
> of userchk (as in the peris example). Would it be possible for you to look<br>
> at my .usr file and tell me what I am doing wrong?<br>
><br>
> I have attached the .rea, .usr, and SIZE with this mail.<br>
><br>
> Further, when I try to view the mesh of the output (or the xyz fld<br>
> outputfile) in visit, visit crashes with the following error:<br>
> VisIt's viewer exited abnormally! Aborting the Graphical User Interface.<br>
><br>
> Lastly, would it be possible to simulate moving walls with large<br>
> deformations (i.e. where multiple elements get deformed), where the<br>
> deformation is known ahead of time? (eg. a flapping aerofoil)<br>
><br>
> Thank you for your help!<br>
><br>
> Regards,<br>
> Pradeep<br>
><br>
> Extract from logfile:<br>
><br>
> 60 U-PRES gmres: 100 7.5345E+42 1.0000E-02 4.0062E+57<br>
> 6.7556E-03 1.5093E-02<br>
> ERROR: alphad .le. 0 in econjp -1.31175831444004495E+179 16<br>
> ERROR: alphad .le. 0 in econjp -1.31175831444004495E+179 16<br>
> ERROR: alphad .le. 0 in econjp -1.31175831444004495E+179 16<br>
> ERROR: alphad .le. 0 in econjp -1.31175831444004495E+179 16<br>
> 60 DNORM, DIVEX 1.18120867781751263E+043<br>
> 7.53448962619089522E+042<br>
> 60 6.0000E-02 1.6697E-02 Fluid done<br>
> DT/DTCFL/DTFS/DTINIT 0.635E-45 0.635E-45 0.000E+00 0.100E-02<br>
> Step 61, t= 6.0800000E-02, DT= 8.0000000E-04, C=******* 2.2667E-01<br>
> 1.8287E-02<br>
> Solving for fluid<br>
><br>
><br>
> 3 ERROR: Vanishing Jacobian near 2th node of element 3.<br>
><br>
><br>
> 2 ERROR: Vanishing Jacobian near 2th node of element 1.<br>
> 2.27348348709230109E+081 -5.12478988977734591E+080<br>
> -2.60483379627720531E+079 3.21465902039155941E+039<br>
> 3 xyz: -5.30056E+39 -5.84642E+39<br>
> 3 xyz: -5.24850E+39 -6.93109E+39<br>
><br>
><br>
> 3 ERROR: Vanishing Jacobian near 2th node of element 4.<br>
> 2 xyz: 1.25061E+38 4.64957E+39<br>
> 9.79493533554062390E+080 -3.01548938509156252E+080<br>
> 2 xyz: -2.46589E-08 -5.64092E-01<br>
><br>
><br>
> 3 xyz: -5.30056E+39 -5.84642E+39<br>
> 3 xyz: -5.24850E+39 -6.93109E+39<br>
> 2 ERROR: Vanishing Jacobian near 3th node of element 2.<br>
><br>
><br>
> 3 ERROR: Vanishing Jacobian near 2th node of element 5.<br>
> 1.43125817410005932E+039 -6.03607926692375119E+038<br>
> 5.54918579647991880E+039 -1.67302572815141788E+039<br>
> 3 xyz: -5.30056E+39 -5.84642E+39<br>
> 2 xyz: -2.46589E-08 -5.64092E-01<br>
> 3 xyz: -5.24850E+39 -6.93109E+39<br>
><br>
><br>
> 3 ERROR: Vanishing Jacobian near 2th node of element 6.<br>
> 2 xyz: -3.07794E-08 -7.04112E-01<br>
><br>
><br>
> 2 ERROR: Vanishing Jacobian near 7th node of element 7.<br>
> 8.35923896949543198E+038 -3.55455289325888722E+038<br>
> 3 xyz: -5.30056E+39 -5.84642E+39<br>
> 1.21747337192549314E+039 -1.79454406120891328E+038<br>
> 3 xyz: -5.24850E+39 -6.93109E+39<br>
> 2 xyz: -5.66434E-08 -1.29581E+00<br>
> 2 xyz: -6.27639E-08 -1.43583E+00<br>
><br>
><br>
> 2 ERROR: Vanishing Jacobian near 9th node of element 8.<br>
> 1.17802538305091326E+039 -4.21489851051369387E+038<br>
> 2 xyz: -6.55671E-08 -1.49996E+00<br>
> 2 xyz: -3.25016E+38 4.93026E+39<br>
> call outfld: ifpsco: F<br>
><br>
> 61 6.0800E-02 Write checkpoint:<br>
><br>
> 61 6.0800E-02 OPEN:<br>
> xyzcyl2.fld01<br>
> Jac error 1, setting p66=4, ifxyo=t<br>
><br>
> call exitt: dying ...<br>
><br>
><br>
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<br>
<br>
</div><span class="HOEnZb"><font color="#888888">--<br>
Josh Camp<br>
<br>
"All that is necessary for the triumph of evil is that good men do<br>
nothing" -- Edmund Burke<br>
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