Nan problem Syrthes conduction

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fchrit
Posts: 14
Joined: Thu Jun 30, 2016 9:33 am

Nan problem Syrthes conduction

Post by fchrit » Thu Jun 30, 2016 9:52 am

Hello,
I am having a problem while running Syrthes 4.3 for a simple conduction case in a cylinder. At the very first iteration, I get Nan in the relative and absolute precision.
*******************************************************************************************
ITERATION NTSYR= 1 -- TIME=1.000000000000e-01 s -- dt=1.000000000000e-01
*******************************************************************************************

---TEMPERATURE SOLVER---
*** GRCONJ: ITERATION RELATIVE PRECISION ABSOLUTE PRECISION
25 nan nan
50 nan nan
75 nan nan
100 nan nan

Any help would be greatly appreciated.
Fatima

Yvan Fournier
Posts: 2638
Joined: Mon Feb 20, 2012 3:25 pm

Re: Nan problem Syrthes conduction

Post by Yvan Fournier » Thu Jun 30, 2016 7:06 pm

Hello,

You probably have a missing or incorrect initial or boundary condition or material property definition error, but it is hard to say where (if possible, increase verbosity and check for the first occurence of NaN). Check the syrthes.log carefully fo other hints (number of faces with a given boundary condition, ...) which might help.

Regards,

Yvan

fchrit
Posts: 14
Joined: Thu Jun 30, 2016 9:33 am

Re: Nan problem Syrthes conduction

Post by fchrit » Fri Jul 08, 2016 10:19 am

Hello,
sorry for answering that late I've just seen your reply. Actually it seemed that I had a problem with my mesh.
Thank you anyway.
Fatima

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