Hydraulics and Fluid Mechanics in ME
In case of an airfoil, the separation of flow occurs

midway between rear and front of body
at the extreme front of body
at the extreme rear of body
any where between rear and front of body depending upon Reynolds number

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Hydraulics and Fluid Mechanics in ME
Coefficient of contraction is the ratio of

Loss of head in the orifice to the head of water available at the exit of the orifice
Actual velocity of jet at vena contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice
Area of jet at vena-contracta to the area of orifice

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Hydraulics and Fluid Mechanics in ME
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

one-half its value when cylinder was full
zero
cannot be predicted from the given data
one-fourth its value when cylinder was full

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