Fluid Mechanics seventh edition by Frank M. White · Problem 6.2

Viscous Flow in Ducts — Frank M. White

Physics — Fluid Mechanics · entrance-length-pipe-flow

Problem

A 12\frac{1}{2}-in-diameter water pipe is 60 ft long and delivers water at 5 gal/min at 20°C. What fraction of this pipe is taken up by the entrance region?

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