How to apply temperature on interface
 

Hi
How can we apply temperature on Fluid-Solid interface?

An interface is intended for connecting two domains. The interface temperature is a result of the tranport equations on both sides. The consequence there is no simple way to set a temperature. You may force it by introducing a boundary source term. You may also try it with internal walls.

If you want to specify temperature on the solid/fluid interface then why model the solid heat transfer at all? This uncouples the solid and fluid domains so no need for CHT.