Heat Source Placement in Relation to Your Heat Sink

Orienting Ourselves and our Heat Source Placement

In Aavid Genie, you have the ability to move and add devices to your heat sink before simulating the thermal performance. We have a graphical user interface (GUI) for heat source placement on your heat sink, but an important question is: how is my heat sink oriented?

Take that heat sink you designed on the heat sink design page, and pick it up with the fins pointing you (in your head since it’s not real yet). Orient the fins so they go up and down in a vertical orientation. Now place that heat sink with the base on the grey box in the heat source GUI. That is how your heat sink is oriented to your heat sources.

Heat Sink Orientation in Aavid Genie Heat Source Placement Screen

Your heat sink base touches your screen, with the flow length as the vertical dimension.

Where is My Thermal Interface Material?

Pick up your heat sink from your screen. See your heat sources? Take your interface material and put it directly on your screen where your devices are. Then you can place your heat sink back on top. Don’t really do this, but just imagine it. I mean, if you wanted to, we can’t stop you from putting thermal interface on your screen.  But we would recommend against it.

For more information on thermal interface materials, what they do, and how to use them in Aavid Genie, check out this post about thermal interface materials!

Where is My Flow Coming From?

Standard forced convection applications have flow coming from the bottom of the screen going towards the top. If you chose fixed impinge flow, that’s coming from your direction straight down on top of the fins.

In natural convection simulations, vertically oriented heat sinks are oriented just like the imaginary heat sink you’re holding up to the screen.

Have fun with your heat source placement and happy designing!

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