[akrasemann]

Hi,

I'm in the process of setting up a simple -but working- case for the OpenFoam chtMultiRegionFoam solver.

The basic scenario I'm modelling is a solid that separates two fluid regions in motion, i.e. a simple version of a heat exchanger. As the geometry I want to assess in the end is a rather complex one, I started of using enGrid for mesh generation, due to the very useful boundary layer creation utility.

The 'Simple heat exchanger' tutorial provided at https://github.com/enGits/engrid/wik...heat-exchanger was very useful to get to know the process of mesh creation as well as exporting mesh data to OpenFOAM.

So I ended up with a tetrahedral and prismatic mesh in enGrid, which is depicted in the attachments.

In the tutorial it is mentioned, that the enGrid export function OpenFOAM (polyhedral) should be used. This works fine and setting up the case in OpenFOAM is straightforward afterwards.

The issue I'm facing is that due to the OpenFOAM (polyhedral) export function the grid is obviously converted to a prismatic and polyhedral grid, which doesn't look that good (see attachment).

My question to the community is: How do you handle the process of mesh generation for multi region cases? Any way to get the region information processed with the OpenFOAM (grid only) export function, as this function does keep the original grid? I would appreciate all your comments on that topic.

Andreas