Fluid Mechanics seventh edition by Frank M. White · Problem 2.30

Pressure Distribution in a Fluid — Frank M. White

Physics — Fluid Mechanics · manometers-multiple-fluids

Problem

For the traditional equal-level manometer measurement in Fig. E2.3, water at 20°C flows through the plug device from

a

b

. The manometer fluid is mercury. If

L = 12

cm and

h = 24

cm,

(a)

what is the pressure drop through the device?

(b)

If the water flows through the pipe at a velocity

V = 18

ft/s, what is the dimensionless loss coefficient of the device, defined by

K = \Delta p/(\rho V^2)

? We will study loss coefficients in Chap. 6.