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interFoam crushes with sanppyHexMesh

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Old   May 2, 2022, 05:06
Default interFoam crushes with sanppyHexMesh
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Livia Adinolfi
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Hi foamers,

I am running a simulation with OpenFoam v.9 to model the overflow of an embankment with the solver interFoam and RAS k-omegaSST.

My final aim is to calculate the wallShearStress along the embankment slope, when the breaching process of the embankment has started and some soil blocks have collpased resulting in a irregular stepped embankment profile.

The case I have implemented is very similar to the Spillway tutorial. (https://wiki.hpc.ntnu.no/display/hpc...llway+Tutorial)

To generate the geometry I tried two approaches:

1) blockMesh with spline edges to draw the "stepped" profile;
2) snappyHesMesh where I have created the .stl file in FreeCAD 3D.

The structure of the two cases is the same for all the other dictionaries and for the Boundary Conditions.

However, when I run the first simulation for the first case everything seems to be fine and I have a solution. Instead, in the second case the simulation crushed and I got the following error:

--------------------------------------------------------------------------------------
Starting time loop

Courant Number mean: 3.61123e-05 max: 0.00210365
Interface Courant Number mean: 0 max: 0
deltaT = 0.000119998
Time = 0.000119998

smoothSolver: Solving for alpha.water, Initial residual = 9.65983e-07, Final residual = 9.65983e-07, No Iterations 0
Phase-1 volume fraction = 0.077085 Min(alpha.water) = 0 Max(alpha.water) = 1
MULES: Correcting alpha.water
MULES: Correcting alpha.water
Phase-1 volume fraction = 0.077085 Min(alpha.water) = 0 Max(alpha.water) = 1
DICPCG: Solving for p_rgh, Initial residual = 1, Final residual = 0.0493387, No Iterations 10
#0 Foam::error:rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 ? at tensorField.C:?
#4 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/interFoam"
#5 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/interFoam"
#6 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/interFoam"
#7 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#8 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/interFoam"
Floating point exception (core dumped)

--------------------------------------------------------------------------------------

Can anyone help me to understand what this error means and why this happens ?

Thank you all for yuor help
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Old   May 13, 2023, 08:08
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Danila Aleksandrov
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hello, I've got the same problem, i try to culculate hull recictance,
I take DTChull case fom tutorials and just insert my STL, then littlebit fix topoSetDicts. after a several itertions like 1000 the solution is crushing.
Please, if u solve the problem, give me a hand.

P.S. sorry for my eng and thank for any help
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