Heat Transfer Between two solid? Help needed

momemon · May 27, 2010, 12:11

I am simulating a test setup where a thermal interface material is in contact between two aluminum blocks. So in other words the TIM is sandwiched between two Al blocks. I defined the four contacting surfaces(lower of first block, upper and lower of TIM, upper of second block) as interfaces in Gambit.

The heat tranfer is taking place with the material properties (density, K and Cp) but it cannot be accurate since I do not have the heat coefficient value as an input. I do not understand how to input the heat coefficient h for an interface?

Do I have to changes the interfaces to walls? Would the heat transfer take place then?

Any help would be highly appreciated.

Omar

yugo_wen · May 27, 2010, 17:24

I don't think u can set h at interfaces...
The heat transfer between them is only heat conducting if they are in contact.

momemon · May 28, 2010, 09:37

That is correct, is there any way I can set it as a wall and simulate heat transfer?

May 27, 2010, 12:11	Heat Transfer Between two solid? Help needed	#1
momemon New Member Join Date: May 2010 Posts: 3 Rep Power: 15	I am simulating a test setup where a thermal interface material is in contact between two aluminum blocks. So in other words the TIM is sandwiched between two Al blocks. I defined the four contacting surfaces(lower of first block, upper and lower of TIM, upper of second block) as interfaces in Gambit. The heat tranfer is taking place with the material properties (density, K and Cp) but it cannot be accurate since I do not have the heat coefficient value as an input. I do not understand how to input the heat coefficient h for an interface? Do I have to changes the interfaces to walls? Would the heat transfer take place then? Any help would be highly appreciated. Omar

May 27, 2010, 17:24	why u need film coeff, h?	#2
yugo_wen New Member Yugo Wen Join Date: May 2010 Posts: 3 Rep Power: 15	I don't think u can set h at interfaces... The heat transfer between them is only heat conducting if they are in contact.

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May 28, 2010, 09:37		#3
momemon New Member Join Date: May 2010 Posts: 3 Rep Power: 15	That is correct, is there any way I can set it as a wall and simulate heat transfer?