Fluid Mechanics
Reciprocating pumps compared to centrifugal pumps

Can handle slurries more efficiently
Deliver liquid at uniform pressure
Are not subject to air binding
Can be operated with delivery valve closed

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Fluid Mechanics
The Prandtl mixing length is

Zero at the pipe wall and is a universal constant
Useful for computing laminar flow problems
Independent of radial distance from the pipe axis
Independent of the shear stress

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