Quote:
Originally posted by NoSoupForYou
Increasing the water flow rate through the rad does one thing, and one thing only. It increases the heat transfer coefficient between the coolant and the walls.
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I think that when the flow is laminary, water flows much slower near the walls of the radiator than in the center of the channel. The effect on cooling is similar to adding a layer of thermal insulator (water does not conduct heat well without convection), which is bad. Increasing the flow rate is good because it can break the laminary flow pattern.
Is this what you meant, NoSoup? Or you had in mind something different?
Quote:
Originally posted by NoSoupForYou
gmat - LMTD is a little over the top here - the temp change in the fluid is small enough that approximating it as constant won't introduce significant error.
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Constant = arithmetic mean? Should be OK if the flow is not too low.