Hi evryone,
This is my 2-d model to find the thermal analysis of resistance spot welding. so, heat load is apply at the place where i put green circle. and then, i want to know what type of contact should be used at the purple line so that heat can flow between the components.

I'm not quite sure if it works for Axi-symmetric models, but FREEZE would be the right contact type for heat transfer by conduction for 3D models.
Have you tried running this? Did you get any error?