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Originally Posted by Les
Not "numbers for the sake of numbers".
Numbers were used in the design:
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Hmmm, maybe reading too much into my statement.
Much of my fumbling math was done assuming 25C water, and the kinematic viscosity that goes along with that. That was what was used to drive the basis of the design, which then got refined through emperical results (and a rough attempt at adapting the maths to fit). I hadn't really anticipated 25% glycol viscosities and the effects that could have.