[Neusier]

Hi,

I´m in a project where I have to analyze the Heat Transfer in a duct from the fluid (air) to the duct itself (aluminium). I created with Catia the duct with its thickness and then the inside solid simulating the fluid.

Then, I mesh it together and it seems to be ok. Two differents meshes, one for the fluid and the other for the solid.

My problem appears in the Setup. The conditions are easy: two inlets with air flow and temperature. The outlet to atmospheric pressure.

I define two domains: fluid and solid, previously in the mesh named selections. I leave the domain interface as default. It this my problem?
Because I get an error when I run the solver.

I dont know how the domain interfaces are defined well. Any trick? May I insert the file here to do easier?

Thanks