substance, as a liquid or gas, that is capable of flowing, and which changes shape when acted on by a force 

mechanics of flowing (deforming) fluids, involving changes in momentum, direction of flow, turbulence, pressure, and volume 

science and technology of using the properties of flow of fluids, to perform functions of sensing, amplifying, and control in nonelectric circuits, and without the use of any mechanical moving parts.

any of a broad group of organic compounds analogous to hydrocarbons, in which all or most of the hydrogen atoms of the hydrocarbon have been replaced by fluorine; some types also contain chlorine, and these are called chlorofluorocarbons. The saturated aliphatic-type fluorocarbons comprise the series of refrigerants developed by Midgeley in the 1930s. Compare halocarbon.

flux

amount of some quantity flowing across a given area (often a unit area perpendicular to the flow) per unit time. Note: The quantity may be, for example, mass or volume of a fluid, electromagnetic energy, or number of particles. See also magnetic flux; heat flux.

heavy wheel attached to a shaft to reduce rotation fluctuations 

facility management system. 

formation of a foam or froth of oil refrigerant due to rapid boiling out of the refrigerant dissolved in the oil when the pressure is suddenly reduced. See also boiler foaming.

figure of merit.

1. action on a body which induces changes of rest or motion.