Quote:
Originally posted by pHaestus
Ben I think that turbulence is somewhat a matter of degree in forced convection, and that even if the bulk fluid is in the fully turbulent regime there is still a boundary layer that can limit convective heat transfer. I would be concerned with this in a "single straight through" channel no matter the width. I think it is safe to assume that most of the cooling of the usual blocks happens right at the center inlet, where that boundary layer is given some serious mixing. Can't run numbers on that though, eh?
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To expand on that a little... the single straight through design I was thinking of, would have those perfect rows of square pyramids, and I might even offset some of the rows, across the flow path, for good mesure (maybe a staggered pattern). The question remains though, how thick should the baseplate be, and how deep/wide does the (single) channel need to be?
I might even take it a step further and split an incoming flow from the top, in which case, it's a different flow dynamic, and different size channels. With tiny fins, along the exit path, but right over the core, it might be good...