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Old   July 16, 2014, 05:52
Default Arithmetic exception
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For some reason, I am continuing to receive an "Arithmetric exception" error message when I attempt to run any 2D simulation after importing from Pointwise. In order to find the culprit I have gone to the simplest case I could think of: a 2D simulation that mimics the 2DAirfoil tutorial but without the airfoil.

I used Pointwise to construct the parameters which consist of a box that was extruded by 0.05m and given a simple structured mesh, passing checkMesh with flying colours:

PHP Code:
Checking geometry...
    
Overall domain bounding box (1 1 0) (101 101 0.05)
    
Mesh (non-empty, non-wedgedirections (1 1 0)
    
Mesh (non-empty) directions (1 1 0)
    
All edges aligned with or perpendicular to non-empty directions.
    
Boundary openness (-3.46598e-21 3.46598e-21 9.19282e-15OK.
    
Max cell openness 1.08813e-16 OK.
    
Max aspect ratio 1 OK.
    
Minimum face area 0.0505051Maximum face area 1.0203.  Face area magnitudes OK.
    
Min volume 0.0510152Max volume 0.0510152.  Total volume 500.  Cell volumes OK.
    
Mesh non-orthogonality Max0 average0
    Non
-orthogonality check OK.
    
Face pyramids OK.
    
Max skewness 1.01608e-13 OK.
    
Coupled point location match (average 0OK.

Mesh OK
The 0 and system folders are identical to the 2DAirfoil except for the removal of the wall.

I ran the code through gdb simpleFoam and it exploded within the first iteration:

PHP Code:
smoothSolver:  Solving for UxInitial residual 0.343067, Final residual 1.85346e+13No Iterations 1000
smoothSolver
:  Solving for UyInitial residual 0.00320924, Final residual 2.19375e+11No Iterations 1000
GAMG
:  Solving for pInitial residual 1, Final residual 5.19741e+118No Iterations 1000
time step continuity errors 
sum local 2.01405e+117, global = 3.29242e+101cumulative 3.29242e+101

Program received signal SIGFPE
Arithmetic exception.
0x00007ffff4ab9575 in Foam::GaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Fielddouble> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned charint) () from /opt/openfoam230/platforms/linux64GccDPOpt/lib/libOpenFOAM.so 
I have no idea what could be wrong with this, as the 2DAirfoil example works perfectly and a similar "laminar flow through a straight pipe" Pointwise to OpenFoam tutorial also works with no issues.

I was unable to attach the pw file or constant folder due to space constraints

Thanks,
Ed
Attached Files
File Type: zip 0.zip (4.0 KB, 0 views)
File Type: zip system.zip (3.9 KB, 0 views)
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