# Bernoulli's principle

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## Bernoulli's principle

[bərno̅o̅′lēz]
Etymology: Daniel Bernoulli, Swiss scientist, 1700-1782
(in physics) the principle stating that the sum of the velocity and the kinetic energy of a fluid flowing through a tube is constant. The greater the velocity, the less the lateral pressure on the wall of the tube. Thus, if an artery is narrowed by atherosclerotic plaque, the flow of blood through the constriction increases in velocity and decreases in lateral pressure. Also called Bernoulli's law.
References in periodicals archive ?
Plastic tanks with different orifice sizes and a plastic tank with various copper pipes were used to experimentally measure drainage time of water; drainage time was theoretically calculated through an equation derived from Bernoulli's equation, which is consequently bound by the same assumptions that Bernoulli's equation is (no friction and for an ideal fluid).
Using the hydrostatic pressure equation at arbitrary height, z, and the Bernoulli's equation for velocity, the mass flow rate from compartment i to compartment j through an opening is given by
Bernoulli's equation (Equation 5) states the change in pressure, kinetic energy, and potential energy is equal to the mechanical energy ([delta][W.
In a similar manner that conservation of mass links areas and velocities, Bernoulli's equation links velocities and static pressures, when applied to a diffuser or a nozzle.
The second method was a spreadsheet solution based on Bernoulli's equation and a momentum balance in one-dimension, henceforth, 1-D.
Each component's influence on the total filter resistance was then formulated through the use of Forchheimer-extended Darcy's Law, Bernoulli's equation, and the equation of continuity.

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