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Originally Posted by GriffinRU
even more complicated, because now you add gas to equation and gravity and direction and sensitivity to temperature range. What works or doesn't work for CPU is not true for every application. With heatpipes selecting correct fluid is very important, more important that pipe is long enough that fluid easily goes through all stages and there is some in liquid form not in gas othewise it stops working...
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They use wicking in heatpipes now, the texture inside the pipe. Also, these things are very efficient in transferring heat to some other place (fins). gravity has little to no affect on heatpipes now.
Why do you think this is SO complicated? Heatsink design is trucky yes, but the basic understanding of heat transfer is simple.