Answer to Question #317774 in Molecular Physics | Thermodynamics for حسن

Question

A pipe in an industrial plant is designed to carry a fluid of density 1500 kg m–3 at a speed of 3 m s–1. Any faster than this and the flow could become turbulent, with undesirable results. Any slower than this and the fluid could start to congeal on the sides of the pipe. The fluid is to be carried from a holding tank which is at a pressure of Pt to a manufacturing line at atmospheric pressure (Patm= 100kPa) which is 2.5 m below the holding tank. At what

pressure must the tank be maintained?

Answer 1

$p=p_0+\rho gh+\frac{\rho v^2}2=143.5~kPa.$