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Flow Simulation, When to use Thermal Joints?

Question asked by Josue Castaner on Feb 14, 2019



I am trying to simulate an electronic device (can't post too much info about it) and I have an aluminum thin plate (about .060" thick) that is being attached to an aluminum housing. The thin plate is secured in place by screws, there are 3 sections of this plate that are in direct contact with the housing (the rest of the plate is not in contact with anything) The material of both parts is aluminum. My question is, do I need to use the thermal joint feature in those 3 contact areas? I am seeing about 5C difference (cooler) in temperature when using the option. I put 166.9 w/k as the thermal conductivity for the thermal joint which is the same as the aluminum that I'm using. Thank you!