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Another bright idea is to use oversized hoses and fittings. This is supposed to somehow increase efficiency. Not so. One of the rules of fluid dynamics states that for any given diameter of pipe or hose, only a finite volume of fluid will pass through it at a fixed rate.
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This is true (given a constant temperature) but not relevant to our system. When using a centrifugal pump in a cooling loop, the flow rate is not fixed but is instead a function of the total system resistance. When you decrease resistance (say by drilling out your hose barbs or running 5/8" barbs on the rad/pump/etc) then you will increase the flow rate. This is also a "law of fluid dynamics"...Darcy's Law.
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Also keep in mind that water blocks are "timed". Depending on the surface area of the water block, a specific volume of fluid must pass through it at a specific rate for optimum heat transfer. The water block itself can only accommodate a set volume, it has a built in restriction - so don't waste your time. Use the correct hose diameter intended for your system.
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I believe that this person completely misses the point. By removing restrictions elsewhere in the loop, one can achieve increased water velocity where it is beneficial (heat transfer is increased by turbulence which increases with water velocity).
I haven't read the article you are quoting but it sounds as if the person should have sought more relevant facts before penning thoughts to paper.