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Originally Posted by bobo5195
...Ie if k=1 then there is perfect heat trasfer. There are special case where k can be lower than 1 if you use pump power to cool the fluid by making it go through a sudden expanssion ...
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...and this applies to liquids as well as gases?!?
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Originally Posted by bobo5195
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Also in a side note i found a paper which suggest that increasing surface roughness by the use of turbulators is a bad idea and that the jet impingment surface should be smooth and a whole lot other stuff.
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Well there you go; you can't believe everything you read.
The jet against a flat plate has been tried, and it's nowhere near the performance range of the Storm block.
When I originally came up with the concept (
here), I was looking for a way to minimize what we're now going to refer to as the "conductive boundary layer" or the "conductive part of the boundary layer". But in the same effort, I was trying to figure out a fin pattern that would work with it, because for everything I've read, It was only possible to improve on a flat plate by using fins.
Maybe this warrants more experiments, but I really believe that the cups, which form an intricate fin pattern are an essential element. Otherwise I agree that turbulators within the jets are a waste; one wouldn't want to do anything to impede the flow within the jet nozzle.