1 Reply Latest reply on May 10, 2010 11:57 AM by Loic Ancian

    Define thermal past layer

    Mohamed Abdel Moniem
    Mohamed Abdel Moniem May 10, 2010 7:29 AM

      I've a power module that generate large amount of heat we are using heat sink to cool it, I want to validate the heat sink design using cosmos, but the problem is that I wan tot define thermal paste layer, actually I've never done that before, could anyone tell me how to so that.

      • 880 Views
      • Categories: Simulation
      • Tags:
        • Re: Define thermal past layer
          Loic Ancian
          Loic Ancian May 10, 2010 11:57 AM (in response to Mohamed Abdel Moniem)

          hello,

          I guess you mean a thermal resistance between two components.

           

          To do so, you first need to define a contact between two faces of your assembly. Then in the contact user interface, you should activate an option "thermal resistance". You can input a total or distributed resistance in °K/W or °K.m²/W.

           

          Of course you need conductivity (or resistivity) of your layer material...:)

           

          If I remember well R= thickness/ lambda

           

          hope it helps.

           

          Loïc