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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The Francis formula for the discharge over Cipoletti weir is

1.84 LH3/2
1.84 LH
1.84 LH5/2
1.84 LH1/2

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (3/4) × (dH/H)
dQ/Q = (dH/H)
dQ/Q = (3/2) × (dH/H)
dQ/Q = (1/2) × (dH/H)

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

between 2000 and 4000
less than 4000
less than 2000
more than 4000

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Hydraulics and Fluid Mechanics in ME
A body floats in stable equilibrium

When its e.g. is below its center of buoyancy
When its meatcentric height is zero
When the metacentre is above e.g.
Metacentre has nothing to do with position of e.g. for determining stability

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Hydraulics and Fluid Mechanics in ME
In a static fluid

Fluid pressure is zero
Resistance to shear stress is small
Only normal stresses can exist
Linear deformation is small

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Hydraulics and Fluid Mechanics in ME
The losses are more in

critical flow
laminar flow
transition flow
turbulent flow

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