Answered: Floating element with negligible gap x-

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter7: Tubing And Piping

Section: Chapter Questions

Problem 3RQ: The size of 1/2 in. would refer to the _______ with regard to ACR copper tubing. A. ID B. OD C....

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Question

In the flow of air at 20°C and 1 atm past a flat plate in
Fig. , the wall shear is to be determined at position x by
a floating element (a small area connected to a strain-gage
force measurement). At x = 2 m, the element indicates a
shear stress of 2.1 Pa. Assuming turbulent flow from the leading
edge, estimate (a) the stream velocity U, (b) the boundary
layer thickness δ at the element, and (c) the boundary layer
velocity u, in m/s, at 5 mm above the element.

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