The thick oil is used in automobiles to reduce the friction and thick oil acts as lubrication in many industrial applications. A thick oil is to be pumped along a cast iron pipeline with an inside diameter of 108 mm at a mass flow rate of 7.8 kg/s. The density of the thick oil is 890 kg/m3 and has a viscosity of 0.002 kg/ms. Determine the pressure drop per unit length of pipe line.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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The thick oil is used in automobiles to reduce the friction and thick oil acts as lubrication in many industrial applications. A thick oil is to be pumped along a cast iron pipeline with an inside diameter of 108 mm at a mass flow rate of 7.8 kg/s. The density of the thick oil is 890 kg/m3 and has a viscosity of 0.002 kg/ms. Determine the pressure drop per unit length of pipe line.  

DVp
Re =
L pV²
AP = 4 f-
D 2
105)
f = 0.001375 · 1 + ( 20,000
D
R
Surface roughness
E, ft
E, in
Drawn tubing (brass, lead, glass, etc.)
Commercial steel or wrought iron
Asphalted cast iron
Galvanized iron
0.00006
0.0018
0.0048
0.006
0.010
0.0072–0.036
0.012-0.12
0.000005
0.00015
0.0004
0.0005
Cast iron
0.00085
Wood stave
0.0006-0.003
Concrete
0.001–0.01
Riveted steel
0.003-0.03
0.036-0.36
Transcribed Image Text:DVp Re = L pV² AP = 4 f- D 2 105) f = 0.001375 · 1 + ( 20,000 D R Surface roughness E, ft E, in Drawn tubing (brass, lead, glass, etc.) Commercial steel or wrought iron Asphalted cast iron Galvanized iron 0.00006 0.0018 0.0048 0.006 0.010 0.0072–0.036 0.012-0.12 0.000005 0.00015 0.0004 0.0005 Cast iron 0.00085 Wood stave 0.0006-0.003 Concrete 0.001–0.01 Riveted steel 0.003-0.03 0.036-0.36
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