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Matching InterfacesΒΆ

In the Conjugate Heat Transfer (CHT) simulations, the interfaces are required for the heat transfer between two regions. These interfaces are generally created automatically during the meshing process. To enable the mesher to create the interfaces automatically, CAD should have the face cutouts at the mating surfaces.

This is the sample CAD for the CHT application, containing three regions, one fluid region and two solid regions.

CAD for conjugate heat transfer simulation

In the following image, there are no face cutouts at the regions where this surface is touching the other parts. The entire surface is continuous so, no interfaces will be created during the meshing, and there will be no heat transfer between these regions.

CAD without face cutouts

CAD without face cutouts

Here, the surface regions, which are in contact with other parts, are precisely cut into separate surfaces. So the interfaces will be created in this case.

CAD with face cutouts

CAD with face cutouts

Once meshing finishes, the list of interfaces can be seen in the mesh log. In case the faces are not split at the mating surfaces, the interfaces at these surfaces will not be created and will not be listed in the log.

Mesh log showing the list of interfaces

Mesh log showing the list of interfaces

Note

Some CAD softwares delete the face cutouts while exporting. Make sure the CAD is exported preserving these separate faces, and inspect it after uploading it to the SimScale platform.