I'm trying to simulate the heat flow through a series of objects. By going through the tutorial given in SolidWorks, I was able to simulate the heat transfer between 2 materials, but when it comes to 3 objects in contact with each other, i'm not able to get the right results.

I've attached the images of the assembly.

The small objects (chips) produce heat of 2 watts each. there are 21 of them. They are placed on an Aluminum plate which is in contact with the outer casing made of mild steel.