Thermal+Mechanical simulation

Hoi Michal

if you need two completely different meshes you better create them in the MESH module yes.

You could also use linear thermal elements and quadratic mechanical elements, then there is not need to create two different meshes in Salome.
(As aparently linear thermal meshes are better? Never use linear mechanical elements I have been told . )
Within CA you can change from linear to quadratic I think.
Furthermore, you can use the Homard module to refine the mesh within CA.
So there are some alternative options.