CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Temperature floating point exception

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes
  • 1 Post By ayckrom

Reply
 
LinkBack Thread Tools Display Modes
Old   October 28, 2014, 11:31
Default Temperature floating point exception
  #1
New Member
 
Join Date: Oct 2014
Posts: 1
Rep Power: 0
ayckrom is on a distinguished road
I receive the following error while simulating an ANSYS Icepak model:

Quote:
Divergence detected in AMG solver: temperature
Divergence detected in AMG solver: temperature

Error at Node 0: floating point exception

Error at host: floating point exception
Error at Node 1: floating point exception

===============Message from the Cortex Process================================

Compute processes interrupted. Processing can be resumed.

================================================== ============================

Error: floating point exception
Error Object: #f

#f

Warning: An error or interrupt occurred while reading the journal file.
Some commands may not have been completed.
Version: 15.0
The simulation is using double precision, and the temperature discretization schemes are standard for pressure and first for momentum/temperature.
The error occurs reliably ~20 minutes into a simulation that should last 8 hours (running on a HPC 2 core allocation).

Previous very similar models didn't have this problem. Any ideas? Thanks!
hashim84 likes this.
ayckrom is offline   Reply With Quote

Old   May 13, 2015, 09:02
Default hi
  #2
Member
 
Pramodh.J
Join Date: Dec 2011
Location: Bangalore, India
Posts: 37
Rep Power: 6
Jupudi.pramodh is on a distinguished road
Send a message via Skype™ to Jupudi.pramodh
Most of the times this error could be due to mesh / boundary conditions.
Keep an eye on the solver (fluent window). this will help you with identifying the reason. Whether the error message is reported during mesh check, or mesh split or solution initialization.

This can also happen after start of first iteration and unfortunately we won't be having any way to check the location of divergence. In such a case i suggest using a Top down appraoch.

Deactivate all assemblies leaving behind only one assembly. Then start solving. If it goes well, activate next and start again.

I most of the times adhere to this approach. This is a bit hectic and time taking but would surely give you a solution to the problem..

give it a try and let me know..

Last edited by Jupudi.pramodh; May 18, 2015 at 06:22.
Jupudi.pramodh is offline   Reply With Quote

Reply

Tags
error, floating point, icepak

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
simpleFoam Floating point exception error -help sudhasran OpenFOAM Running, Solving & CFD 3 March 12, 2012 17:23
block-structured mesh for t-junction Robert@cfd ANSYS Meshing & Geometry 20 November 11, 2011 05:59
rhoPimpleFoam aborting with floating point exception (because of wrong bc p?) space OpenFOAM Running, Solving & CFD 2 October 5, 2011 05:44
Floating point exception error with small DeltaT rassilon OpenFOAM Running, Solving & CFD 19 September 2, 2009 07:39
Gmsh and samplesurface touf Open Source Meshers: Gmsh, Netgen, CGNS, ... 2 December 10, 2007 03:27


All times are GMT -4. The time now is 11:12.