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Sigfpe and ihDyMFoam

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Old   January 26, 2016, 09:35
Default Sigfpe and ihDyMFoam
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Martin Simon
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Greetings foamers!
I am a beginner in CFD and this is my first post here.
I apologize in advance:
I am not sure whether this is a repost or not, because I have found similar problems in this forum, but not (at least understood ) the answer.

The problem (I have attached the 0.org):
I am combining interDyMFoam tutorial case floatingObject with ihFoam tutorial case irreg45degTank using ihDyMFoam to simulate a cuboid in waves.

The simulation runs fine for first 3 minutes, but then I get the following error:

#0 Foam::error:rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 double Foam::sumProd<double>(Foam::UList<double> const&, Foam::UList<double> const&) at ??:?
#4 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#5 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
#6 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??:?
#7 ? at ??:?
#8 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#9 ? at ??:?
Floating point exception (core dumped)

I understand that this indicates there is something wrong with physics (dividing by zero), but as far as I can't get my head around where the problem could be.

Thank You in advance!
Martin Simon
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File Type: zip 0.org.zip (5.8 KB, 12 views)
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Old   January 27, 2016, 03:54
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Pablo Higuera
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Hi Martin,

the eternal problem with interDyMFoam: it gets pressure instabilities and blows up. You should check whether this problem has been caused by a very deformed mesh or just by the solver parameters themselves.

Best,

Pablo
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Old   September 21, 2016, 10:01
Default IHDyMFoam for floatingObject
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Benedetto Di Paolo
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Hi,
I have a problem with this simulation. I modified floatingObject tutorial in OF2.4 and I used ihFoam for waves generation. I link simulation folder and a video that shows the problem around the floating body. I think that it is due to mesh instability and the problem is with 6DoF in dynamicMeshDict. Do you have any suggestions?
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File Type: gz GALLEGGIANTE.tar.gz (8.1 KB, 7 views)
File Type: gz video.ogv.tar.gz (38.7 KB, 8 views)

Last edited by benedip; September 22, 2016 at 05:42.
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6-dof, floating body, ihdymfoam, waves

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