[frangf]

Hi everyone.

I'm starting to use Openfoam and I have some doubts with an error I got.

I'm simulating a simple heat transfer problem involving a simple heat sink and air. I started the problem using the cpuCabinet tutorial files, and I did the geometry and mesh using Salome.

The error I got shows a min rho value of 0. I am using the perfect gas equation of state for air, so I tried using rhoConst equation of state to solve the 0 rho value. When I tried this, I got other error that the temperature was negative.

I already tried to limit the temperature, but I don't if it didn't work or I didn't place this limit in the correct folder (fvOptions, but which directory?).

This is the error for min rho = 0 value:

Time = 1


Solving for fluid region fluid
DILUPBiCGStab:  Solving for Ux, Initial residual = 1, Final residual = 0.042796894, No Iterations 1
DILUPBiCGStab:  Solving for Uy, Initial residual = 1, Final residual = 0.038868498, No Iterations 1
DILUPBiCGStab:  Solving for Uz, Initial residual = 1, Final residual = 0.028137352, No Iterations 1

Solving energy coupled regions
Creating lduPrimitiveAssembly: lduAssembly3
DILUPBiCGStab:  Solving for h, Initial residual = 0.99893615, Final residual = 0.027460353, No Iterations 2
FDICPBiCGStab:  Solving for p_rgh, Initial residual = 0.56125707, Final residual = 0.0053949441, No Iterations 29
time step continuity errors : sum local = 0.41127749, global = -0.013829449, cumulative = -0.013829449
Min/max rho:0 3.8594714
[stack trace]
=============
#1  Foam::sigFpe::sigHandler(int) in /usr/lib/openfoam/openfoam2312/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so
#2  ? in /lib/x86_64-linux-gnu/libc.so.6
#3  Foam::divide(Foam::Field<double>&, Foam::UList<double> const&, Foam::UList<double> const&) in /usr/lib/openfoam/openfoam2312/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so
#4  Foam::compressibleTurbulenceModel::phi() const in /usr/lib/openfoam/openfoam2312/platforms/linux64GccDPInt32Opt/lib/libcompressibleTurbulenceModels.so
#5  ? in /usr/lib/openfoam/openfoam2312/platforms/linux64GccDPInt32Opt/lib/libcompressibleTurbulenceModels.so
#6  ? in /usr/lib/openfoam/openfoam2312/platforms/linux64GccDPInt32Opt/bin/chtMultiRegionSimpleFoam
#7  ? in /lib/x86_64-linux-gnu/libc.so.6
#8  __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
#9  ? in /usr/lib/openfoam/openfoam2312/platforms/linux64GccDPInt32Opt/bin/chtMultiRegionSimpleFoam
=============
Floating point exception

I think it is related to the boundary conditions, but I'm not sure which one.

I hope somebody can give me a hand on this problem.

https://drive.google.com/drive/folde...usp=drive_link