What is the meaning of thermal conductance defined in contact? What is the program controlled Thermal conductance value? How to achieve partial conductance through the contact?
Tagged: 18.2, contact, Genral, mechanical, structural-and-thermal, structural-mechanics
January 25, 2023 at 7:34 amFAQParticipant
It represents thermal conduction through the contact. q=TCC(Tc-Tt) Theoretically, TCC=infinity would represent perfect contact. Thus, Tc=Tt for TCC=infinity. However if user defines too large a TCC value, it will create numerical instability issues. So the default calculation is an attempt to come up with a large enough value for TCC to simulate “perfect” thermal contact without causing numerical instability. Partial thermal contact can be achieved by throttling TCC down to a small value. As TCC gets smaller, the Delta Temp between contact and target surfaces should increase. As TCC approaches zero, q=zero and the interfaces approaches a perfectly insulated condition with no heat transfer.
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