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Question

The wall shear stress for flow in a narrow annular gap

between a fixed and rotating cylinder functionally depends on

density p. viscosity μ, angular velocity 52, outer radius R. and

gap width Ar:

Tw=f(p.H, S, R, Ar)

Draw a schematic of the system.

Using (p. 2. R) as repeating variables, rewrite this relation in

dimensionless form and identify the "Pis" obtained.