Hydraulics and Fluid Mechanics in ME
Euler’s dimensionless number relates the following

pressure force and inertial force
inertial force and gravity
viscous force and buoyancy force
viscous force and inertial force

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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
Is also known as capillarity
Decreases with fall in temperature

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Hydraulics and Fluid Mechanics in ME
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if

Diameter of both the pipes is same
Loss of head and velocity of flow in both the pipes is same
Length of both the pipes is same
Loss of head and discharge of both the pipes is same

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