Fluid Mechanics seventh edition by Frank M. White · Problem P6.26
Viscous Flow in Ducts — Frank M. White
Physics — Fluid Mechanics · laminar-pipe-flow
Problem
Two oil tanks are connected by two 9-m-long pipes, as in Fig. P6.26. Pipe 1 is 5 cm in diameter and is 6 m higher than pipe 2. It is found that the flow rate in pipe 2 is twice as large as the flow in pipe 1. (a) What is the diameter of pipe 2? (b) Are both pipe flows laminar? (c) What is the flow rate in pipe 2 (m3/s)? Neglect minor losses.