The water line described in Problem 8.22 was a cold water distribution line. At another point in the system, the same-size tube delivers water at 180°F. Compute the range of volume flow rates for which the flow would be in the critical region.
Problem 8.22
The range of Reynolds numbers between 2000 and 4000 is described as the critical region because it is not possible to predict whether the flow is laminar or turbulent. One should avoid operation of fluid flow systems in this range. Compute the range of volume flow rates in gal/min of water at 60°F for which the flow would be in the critical region in a ¾-in Type K copper tube.
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