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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(2 L.A.N)/60
L.A.N
(L.A.N)/60
2 L.A.N

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

centroid of the displaced volume of fluid
does not exist
e.g. of floating body
center of pressure of displaced volume

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Hydraulics and Fluid Mechanics in ME
The Bernoulli's equation is based on the assumption that

All of these
No force except gravity acts on the fluid
There is no loss of energy of the liquid flowing
The velocity of flow is uniform across any cross-section of the pipe

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Hydraulics and Fluid Mechanics in ME
The speed of a pressure wave through a pipe depends upon

the viscosity of fluid
the bulk modulus for the fluid
the original head
the length of pipe

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Hydraulics and Fluid Mechanics in ME
Froude's number is the ratio of inertia force to

Surface tension force
Gravity force
Elastic force
Pressure force

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

43924
27/8
44078
43892

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