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Originally Posted by bobo5195
You could design a fairly good water block of just the stanton number and its member parts. st= nu/(re*pr)
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No, you could quantify how effective a design is using those numbers.
A dimensionless number alone means little, other than as a means to quantify some effect. Can't design a waterblock around a dimensionless number. Can use the number to know that you're headed in the right direction, but h(eff) is suitable enough for that purpose anyway, especially in a compound scenario of many effects.