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Help in Heat Trasnfer Module of COMSOL

  1. Apr 12, 2014 #1
    Hi i am simulating Heat transfer through bimetal that is builded by SiO2 on one side and Aluminium on other side. But when i apply heat source on one side(Aluminium side)the heat do not get transferred to the other side(SiO2 side) through the interface. Only Aluminium side is showing temperature distribution not the SiO2 side. I don't know what type of boundary condition i have to apply at the interface so that heat will get conducted through the interface from aluminium layer to SiO2 layer properly.
    Thank you.
  2. jcsd
  3. Apr 14, 2014 #2
    Hhhmm...I was hoping some COMSOL user would come along and answer this seemingly simple issue.

    I am not an FEA modeler, but I think I can offer a couple of ideas that might work.

    If you build your model from the bottom up, i.e., creating points, then lines, then surfaces and then volumes.

    You may think of building your SiO2 and Aluminum pieces separately but that is not correct as you will then need to figure out how to glue them together; instead, make sure you build the pieces by re-using the common surface.

    In other words, instead of having 4 points from one piece on one end and another 4 points from the other, with 2 of the points being concurrent....you just really need 6 points...using the top 2 and the middle 2, you create lines and a surface for the end of one bar and using the bottom 2 and the middle 2 (again), you create the remaining lines and another surface for the end face of the other bar.

    Proceed similarly with the rest of the points, create a single set of lines and surface for the middle common wall.

    Create the two volumes re-using the common wall

    I think after this, your model should behave as you expect...I hope.

    On the flip side, if you are the kind of user that make models via volumes and boolean operations, I think you may be able to build a single volume as large as your bimetal piece, then come and split the piece right down the middle making sure to request something during the operation so that you do not end up with two separate bodies but with 2 pieces sharing a common wall....maybe you can find something along those lines ?

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