[Commercial meshers] Importing 3D Fluent Mesh file into OpenFOAM Error

SamEngD · December 20, 2016, 12:00

Hello CFD online community,

I am fairly new to OpenFoam and posting online for help, so please forgive me if this is not asked in the correct thread or has been covered before.

I am trying to take the 3D geometry from the pipe tutorial in Fluent and import it into OpenFoam to perform the simulation in 3D. I have set up the geometry and saved it as a .msh ASCII file. I was not sure how many named sections were required so I named all external faces.

Inlet velocity (small and large)
Pressure Outlet
Symmetry... and...
The outer half of the pipe.

When I run fluent3DMeshToFoam the boundary conditions appear fine and I adapted the 2D elbow tutorial in OpenFoam and it runs, but the Courant number increases and I get the errors below with (core dumped).

If anyone could tell me where I can find out how to create the geometry correctly in ANSYS to import into OpenFoam or whether that is correct but I am doing something else wrong that would be a great help.

Thanks in advance

Sam

Courant Number mean: 92.1761 max: 6992.39
#0 Foam::error:

rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??:?
#4 Foam::symGaussSeidelSmoother::smooth(Foam::Field<d ouble>&, Foam::Field<double> const&, unsigned char, int) const at ??:?
#5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#6 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#7 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#8 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#9 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#11 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam"
Floating point exception (core dumped)

Flukato · January 3, 2017, 03:47

If the Mesh is the Problem you should check the differences between the two checkMesh log files

SamEngD · January 19, 2017, 10:55

Hi Marvin thanks for your reply, I have since removed the error by significantly reducing the deltaT in the ControlDict file. However I am still not gaining matching results to Fluent and the contours do not look quite right. The example in OpenFoam is 2D and the geometry I am trying to work with is 3D from the ANSYS tutorial, would you know the correct way to set this up?

December 20, 2016, 12:00	Importing 3D Fluent Mesh file into OpenFOAM Error	#1
SamEngD New Member Sam Join Date: Sep 2016 Posts: 7 Rep Power: 9	Hello CFD online community, I am fairly new to OpenFoam and posting online for help, so please forgive me if this is not asked in the correct thread or has been covered before. I am trying to take the 3D geometry from the pipe tutorial in Fluent and import it into OpenFoam to perform the simulation in 3D. I have set up the geometry and saved it as a .msh ASCII file. I was not sure how many named sections were required so I named all external faces. Inlet velocity (small and large) Pressure Outlet Symmetry... and... The outer half of the pipe. When I run fluent3DMeshToFoam the boundary conditions appear fine and I adapted the 2D elbow tutorial in OpenFoam and it runs, but the Courant number increases and I get the errors below with (core dumped). If anyone could tell me where I can find out how to create the geometry correctly in ANSYS to import into OpenFoam or whether that is correct but I am doing something else wrong that would be a great help. Thanks in advance Sam Courant Number mean: 92.1761 max: 6992.39 #0 Foam::error:rintStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" #3 Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??:? #4 Foam::symGaussSeidelSmoother::smooth(Foam::Field<d ouble>&, Foam::Field<double> const&, unsigned char, int) const at ??:? #5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:? #6 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam" #7 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam" #8 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam" #9 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam" #10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #11 ? in "/home/sam/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/icoFoam" Floating point exception (core dumped)

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January 3, 2017, 03:47		#2
Flukato New Member Marvin Join Date: Dec 2016 Posts: 3 Rep Power: 9	If the Mesh is the Problem you should check the differences between the two checkMesh log files

January 19, 2017, 10:55		#3
SamEngD New Member Sam Join Date: Sep 2016 Posts: 7 Rep Power: 9	Hi Marvin thanks for your reply, I have since removed the error by significantly reducing the deltaT in the ControlDict file. However I am still not gaining matching results to Fluent and the contours do not look quite right. The example in OpenFoam is 2D and the geometry I am trying to work with is 3D from the ANSYS tutorial, would you know the correct way to set this up?