Conjugate Heat Transfer with a Surface Roughness

Thank you for the heads up about the mesh. Where in the meshing log does it say how many illegal cells there are?

I posted the link to two different projects in my last reply. The only type of simulations I’ve done in “Heat Transfer in a Tube” has been CHT. The other one I only did Incompressible flow.

I didn’t think to check if the mass flow rate BC works with a finer mesh. I figured since the freestream and mean value options worked then the mass flow rate BC would work as well.

All of the runs under the project “Heat Transfer in a Tube” show the fluid density at 2 kg/m3.

Sidenote: I tried to keep the mesh I’m using for this simulation relatively rough since I am just trying to learn how to set up the analysis and I wanted to do a bunch of quick simple runs, but the cells didn’t come out perfectly. How can I straighten out the mesh divisions in the corners of the surfaces in the future?