When applied to tube flow, the 17-power velocity profile can be written as where C is a
Question:
When applied to tube flow, the 1⁄7-power velocity profile can be written as
where C is a constant. This is analogous to Eq. (10.6-4) for a turbulent boundary layer. Show that this expression implies that the friction factor varies as Re–1⁄4, as in the Blasius equation for smooth pipes [Eq. (2.2-9)]. How does the value of C implied by the Blasius correlation compare with the constant in Eq. (10.6-4)? (Start by using the 1⁄7-power expression to evaluate the velocity at the tube centerline.)
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The given velocity profile for tube flow is w C17 P 1 At the tube centerline y 0 the velocity w becomes the maximum velocity and we can set y 0 in the ...View the full answer
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Related Book For 
Introduction To Chemical Engineering Fluid Mechanics
ISBN: 9781107123779
1st Edition
Authors: William M. Deen
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