[Aldanu]

Hi everybody,
I have a problem with a heat exchanger I meshed with ansys. It's made of three parts: a central cylinder representing air, a surrounding alluminium layer and a CO2 layer surrounding alluminium. Unfortunately, when trying to separate these regions in openfoam with the command splitMeshRegions -cellZones -overwrite , the process gets killed but does not give any error advice to explain what the problem is. Thinking it could depend on the fact that the mesh was too fine, I tried to use a shorter (10 cm) and coarser version of this exchanger, and the process worked with no problems (the original exchanger is 2.64 m long). Still, I have to mesh the original exchanger and I haven't fully understood the problem. I'd really appreciate your help, I'll also attach what the terminal says






pepito@debvbox:~/OpenFOAM/pepito-3.0.1/run/multiRegionHeaterRadiation$ splitMeshRegions -cellZones -overwrite
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 3.0.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : 3.0.1-d8a290b55d28
Exec : splitMeshRegions -cellZones -overwrite
Date : Sep 04 2016
Time : 11:27:17
Host : "debvbox"
PID : 5366
Case : /home/pepito/OpenFOAM/pepito-3.0.1/run/multiRegionHeaterRadiation
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Creating single patch per inter-region interface.

Trying to match regions to existing cell zones.


Number of regions:3

Writing region per cell file (for manual decomposition) to "/home/pepito/OpenFOAM/pepito-3.0.1/run/multiRegionHeaterRadiation/constant/cellToRegion"

Writing region per cell as volScalarField to "/home/pepito/OpenFOAM/pepito-3.0.1/run/multiRegionHeaterRadiation/0/cellToRegion"

Region Cells
------ -----
0 369600
1 166320
2 535920

Region Zone Name
------ ---- ----
0 0 aria
1 1 alluminio
2 2 co

Sizes of interfaces between regions:

Interface Region Region Faces
--------- ------ ------ -----

Reading volScalarField alphat
Reading volScalarField nut
Reading volScalarField p_rgh
Reading volScalarField cellToRegion
Reading volScalarField p
Reading volScalarField T
Reading volScalarField k
Reading volScalarField omega
Reading volVectorField U


Adding patches


Adding patches


Region 0
--------
Creating mesh for region 0 aria
Testing:"/home/pepito/OpenFOAM/pepito-3.0.1/run/multiRegionHeaterRadiation/system/aria/fvSchemes"
Writing dummy "aria/fvSchemes"
Writing dummy "aria/fvSolution"
Killed

[saiguruprasad]

Facing the same issue, did you find any fix for this?

[HPE]

any reproducible example? preferably with a tutorial?

[saiguruprasad]

I have sorted this problem out.

When I export the mesh from ICEMCFD, I make sure that the two-sided walls are given the interface boundary condition. This makes sure that OpenFOAM is able to identify them as interface and creates the solid-fluid interface.