Hydraulics & Fluid Mechanics
Separation of flow occurs when

the cross-section of a channel is reduced
the boundary layer comes to rest
All of these
the pressure intensity reaches a minimum

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Hydraulics & Fluid Mechanics
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

constant over the cross section
parabolic distribution across the section
zero at the mid plane and varies linearly with distance from mid plane
zero at plates and increases linearly to midpoint

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