A horizontal pipe carries oil whose coefficient of viscosity is0.00012 N·s/m 2 .

Question

A horizontal pipe carries oil whose coefficient of viscosity is0.00012 N·s/m2. The diameter of the pipe is5.0 cm and its length is 58 m. (a) What pressure difference is requiredbetween the ends of this pipe if the oil is to flow with an averagespeed of 1.0 m/s?
1 Pa
(b) What is the volume flow rate in this case?
2 m3/s (a) What pressure difference is requiredbetween the ends of this pipe if the oil is to flow with an averagespeed of 1.0 m/s?
1 Pa
(b) What is the volume flow rate in this case?
2 m3/s

Explanation / Answer

Given : coefficient of viscosity ( n ) = 0.00012N·s/m2.     Diameter ( d ) = 5 .0 cm Radius ( r ) = 2.5 cm = 2.5 * 10-2 m    Speed ( v ) = 1.0 m/s Density of water ( ) = 103kgm/m3 P = 1/2 v2         = ----- Pa         = ----- Pa     Volume flow rate ( Q ) = r4 P / 8 n L = ----- m3/s Where P is the Pressure difference Plugin the values and sove it

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