Because pressure transmits equally throughout fluids, pressure sum, and energy sum, is constant {Bernoulli's theorem} {Bernoulli theorem} {Bernoulli's principle}. At pipe points, energy conserves. Pressure stays constant throughout fluid.
If fluid goes through narrower pipe area, fluid speeds up, because mass cannot build up. Higher speed makes more kinetic energy and directed pressure. Sideways pressure decreases, to conserve energy. If fluid slows, kinetic energy goes down, and potential energy and sideways pressure increase.
examples
Fountains, tanks with holes, aspirators, sprayers, Venturi meters, wings, pipes, rubber tubes, and curve balls demonstrate Bernoulli's principle.
Physical Sciences>Physics>Dynamics>Fluid>Pressure
5-Physics-Dynamics-Fluid-Pressure
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Date Modified: 2022.0224