The water pressure in a pipeline while the water is flowing. It is equal to the static pressure (measured in a closed pipline) minus pressure loss from friction, turbulence and cavitation in the pipeline and fittings. See also: Static Pressure
(Also called velocity pressure, stagnation pressure.) In engineering fluid mechanics, the kinetic energy, (1/2) 2, of the fluid, where is the density and the speed. This applies in cases where this quantity may be conveniently considered as adding to the static pressure; that is, the dynamic pressure at a given point is the difference between the static pressure at that point and the total pressure at the stagnation point of the same streamline. This concept must be distinguished from the hydrodynamic pressure, and the terminology is confusing in meteorological contexts.