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August 6, 2008, 10:35 |
Hi!
I'm working with OpenFOAM
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#1 |
New Member
Claudio Feliciani
Join Date: Mar 2009
Location: Tokyo, Japan
Posts: 2
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Hi!
I'm working with OpenFOAM for a simulation of the liquid steel behaviour for a Twin Roll Casting maschine. I succesfully created a mesh and added the necessary boundary conditions. When I start the computation with interFoam after the second time-iteration a get an error message: "Floating point exception". I searched with google the meaning of this error but there's not lot of documentation. Could you please tell me which could be one of the possible reason that yield such an error message? Thank you, Claudio Feliciani |
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August 6, 2008, 11:36 |
Your solver blew up because of
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#2 |
Senior Member
Hrvoje Jasak
Join Date: Mar 2009
Location: London, England
Posts: 1,906
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Your solver blew up because of an illegal mathematical operation, like division by zero. I would think this is to do with either your initial/boundary conditions or material properties. For example, having zero density would do something like this.
Enjoy, Hrv
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August 7, 2008, 08:20 |
I've solved the problem by set
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#3 |
New Member
Claudio Feliciani
Join Date: Mar 2009
Location: Tokyo, Japan
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I've solved the problem by setting:
unset FOAM_SIGFPE Now the simulation is running and the results seem to be good. Actually I know what the command unset FOAM_SIGFPE (it tell OpenFOAM to not send the term signal to the CPU in case of an illegal operation, if I've not understand wrong), but what could be the risks by using that method to remove the "Floating point exception" problem? The same topic were discussed in http://www.cfd-online.com/OpenFOAM_D...tml?1201770596 but no answer were finally given. Thanks, Claudio |
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December 21, 2010, 14:04 |
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#4 |
Member
N. A.
Join Date: May 2010
Posts: 64
Rep Power: 16 |
Hi Claudio,
where do you "unste FOAM_SIGFPE". in etc/bashrc or some where else Thanks, Nir |
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December 22, 2010, 08:42 |
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#5 |
Senior Member
David Boger
Join Date: Mar 2009
Location: Penn State Applied Research Laboratory
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Assuming you are using a bash shell, I would put it in your .bashrc
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David A. Boger |
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February 8, 2012, 01:02 |
Floating error
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#6 |
Member
Join Date: Jan 2012
Posts: 58
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Hello
i am having floating error :invalid number problem. I am working train in tunnel. Can any body help me. My email is sheikhnasir39@gmail.com |
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April 17, 2013, 04:43 |
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#7 |
Senior Member
starter
Join Date: Sep 2012
Posts: 125
Rep Power: 16 |
Claudio
I am doing LES of my geometry. In which dictionary do you put unset FOAM_SIGFPE. My dictionaries are what can be found in pitzDaily tutorial in pisoFOam. I shall be very grateful for your response. Regards |
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November 19, 2023, 04:48 |
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#8 |
New Member
Rohan
Join Date: May 2023
Posts: 20
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Where do i put the unset foam_sig, im stuck with the floating point exception would really appreciate ur reply
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November 27, 2023, 04:22 |
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#9 |
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S.M. Nafiz Ahmed
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November 27, 2023, 04:29 |
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#10 |
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Rohan
Join Date: May 2023
Posts: 20
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Thank you very much
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November 29, 2023, 12:44 |
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#11 |
Member
Anurag
Join Date: Feb 2023
Posts: 69
Rep Power: 3 |
If i use a job script to submit a openfoam job on hpc shall I put unset command in my jobscript before putting the interFoam command??
many thanks. |
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