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Thermal contact resistance
Posted 03.07.2020, 13:22 GMT-4 Electromagnetic Heating Version 5.4 1 Reply
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Dear COMSOLers,
For heat sink problems, how comsol treat the thermal contact resistivity at the interface between the two materials if no "Thermal Contcat" boundary condition defined? Does it just assumes a perfect contact with thermal contact resistance = 0 [m^2.K/W]?
Regards, Tamer
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First, some Caveats: (1) I would have to see your specific model details and how you set it up to be sure of my answer, and (2) I only do thermal models occasionally. That said, I believe the answer to your question is yes. I.e., if you are modeling thermal phenomena and have two domains that adjoin with a common boundary, then the assumed thermal contact resistance would be zero at that boundary. Note that you can specify a non-zero thermal contact resistance at the boundary, if you wish to do so.
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