Quote:
Originally Posted by Brwmogazos
So with such big variations between the theoretical and actual flow rates and temp difference can u get the reynolds number as high as needed to prove the flow would be turbulent in any watercooling setup nowadays?
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Re below 2000 brings about laminar flow, while above 3000 means turbolent flow is predominant. One has to take into account that there will always be a (albeit very thin) boundary layer of laminar flow becouse of surface tension. What happens between 2000 in 3000 is that laminar flow is gradualy breaking up into vortexes persisting more frequently along the sides.
Re = [ro] * v * d / [ni] holds true for flow through a hose. Things do however get far more complicated when one puts an arbitrary object (say a waterblock) into the path of the flow. Now some particles scatter (depending on the shape of the object) creating more vortexes as they collide with each other. This phenomena is used for inducing turbolent flow as can be seen in most of moderen waterblocks.
To get back to your question, I do not see any elegant way to mathematicaly prove that flow in the waterblock is turbulent. One can only prove that laminar flow is predominant in the hoses.