Hydraulics and Fluid Mechanics in ME
Surface tension

Is a function of the curvature of the interface
Acts in the plane of the interface normal to any line in the surface
Decreases with fall in temperature
Is also known as capillarity

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Hydraulics and Fluid Mechanics in ME
Mechanical efficiency of a centrifugal pump is the ratio of

Actual work-done by the pump to the energy supplied to the pump by the prime mover
Energy supplied to the pump to the energy available at the impeller
Manometric head to the energy supplied by the impeller per kN of water
Energy available at the impeller to the energy supplied to the pump by the prime mover

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