Daniel Bernoulli
in the year 1738 stated that in a steady flow system of frictionless (of
non-viscous) incompressible fluid, the sum of pressure, elevation and velocity
heads remains constant at every section, provided no energy is added to or
taken out by an external source.
This statement
of Daniel Bernoulli, known as the Bernoulli’s Energy Equation, can be applied
in practice for the construction of flow measuring devices such as Venturi
meter, flow nozzle, orifice meter and Pilot tube. Furthermore, it can be
applied to the problems of flow under a sluice gate, free liquid jet, radial flow
and free vortex motion.
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