Show that, if we define the shear stress at the pipe wall as t = fpV2 / 2, Eq. 6.19, and then calculate the pressure gradient for horizontal flow, we find Eq. 6.18.

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
Section: Chapter Questions
Problem 1.1P
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Show that, if we define the shear
stress at the pipe wall as t = fpV2 / 2,
Eq. 6.19, and then calculate the
pressure gradient for horizontal flow,
we find Eq. 6.18.
Transcribed Image Text:Show that, if we define the shear stress at the pipe wall as t = fpV2 / 2, Eq. 6.19, and then calculate the pressure gradient for horizontal flow, we find Eq. 6.18.
f friction factor
T=
4(Ax/D) (V²/2)
shear stress
at pipe wall) =f.p²
(6.18)
(6.19)
Transcribed Image Text:f friction factor T= 4(Ax/D) (V²/2) shear stress at pipe wall) =f.p² (6.18) (6.19)
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