Quote:
Originally posted by Les
2) The Convection Coefficient is calculated by Kryotherm*. Kryotherm uses the Sieder-Tate relationship. Have calculated at various flow rates for two Channel sizes(10x1.1mm and 40x0.8mm).It is plotted against flow-rate(LPM)
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Heh. "High priced engineering software packages" said gone_fishin. Riiiight.
This goes against some things I said last year regarding BigBen's Radius block, but I would be extremely careful using a S-T correlation for a waterblock. It's a quasitheoretical relationship that is intended only for uniform flow fields. Inlet effects, macroeddies, stagnation, etc. for a block will probably drown out the effects of the linear flow field.
You can *maybe* get heat transfer coefficients within a degree of magnitude or two using S-T, so you can make very vague comparisons between designs as long as they are relatively simple. But if you want to know anything at all about the block performance, you really need a discrete numerical analysis.
Alchemy