[bmikuz]

Hello everyone,

I run out of ideas how to solve my problem, so I decided to ask for your help here.

I have a mesh made with ICEM and I'd like to import this mesh in OpenFOAM. The mesh has cca 13e6 points and contains solid & fluid regions (it is a model of nuclear reactor fuel assembly with spacer grids and mixing vanes...). I want to simulate the water flow through such geometry and I don't need to calculate heat transfer, so I need only mesh for fluid regions.

The ICEM mesh is saved in fluent format and converted with fluent3DMeshToFoam to OpenFOAM format. If checkMesh is run after that, I get an error:

checkMesh: malloc.c:3551: munmap_chunk: Assertion `ret == 0' failed.
Aborted

I get the same error also when I run decomposePar (or also simpleFoam, potentialFoam,...) on this mesh. If the mesh contains solid and fluid regions, it doesn't have any holes and I don't get any error. The problem arises only if the solid regions are excluded from mesh (in ICEM) and then this mesh with holes is converted in OpenFOAM.

Please help me out! I already tried to increase vm.max_map_count on the system, but it didn't help.

Thanks a lot!