Maintained Pressure. The water pressure in the pipework to a fitting whilst flow is taking place.

Dynamic pressure is the component of fluid pressure that represents fluid kinetic energy (i.e. motion). There are operations and pressure loading present.

Refers to the pressure level (bar/kPa) when there is an actual flow.

The pressure when the water is flowing.

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

The difference in pressure levels from static pressure to stagnation pressure caused by an increase in velocity. Dynamic pressure increases by the square of the velocity.

The pressure of water as it is moving through the system. Also called working pressure.

The pressure reading in a pipeline system with water flowing.

The pressure of a fluid in motion, measured by the pressure it exerts on a flat surface.

(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.