Diffuser vs. Impeller — What's the Difference?

A light fixture, such as a frosted globe, that spreads light evenly.

One that impels, as a rotating device used to force a fluid in a desired direction under pressure.

A medium that scatters light, used in photography to soften shadows.

An impeller or impellor is a rotor used to increase the pressure and flow of a fluid. It is the opposite of a turbine, which extracts energy from, and reduces the pressure of, a flowing fluid.

A device, such as a cone or baffle, placed in front of a loudspeaker diaphragm to diffuse the sound waves.

The rotating part of a centrifugal pump, compressor, or other machine designed to move a fluid by rotation.

A flow passage in a wind tunnel that decelerates a stream of gas or liquid from a high to a low velocity.

A rotor or rotor blade.

Any person or thing that diffuses.

Something which or someone who impels.

A device designed to diffuse a scent efficiently.

A rotating component that accelerates fluid outward from a center of rotation, found in devices such as pumps, water jets, washing machines, and agitated tanks.

(optics) Any device that or spreads out or scatters light, making the light appear softer.

One who, or that which, impels.

(automotive) A shaped section of a car's underbody which improves the car's aerodynamic properties.

The blade of a rotor (as in the compressor of a jet engine)

(thermodynamics) A mechanical device that is designed to control the characteristics of a fluid at the entrance to a thermodynamic open system.

(sewage treatment) An aerating device consisting of a membrane with fine pores, through which air is blown to generate small bubbles.

(cooking) A cooking item that can be placed above a stove heating element or burner to separate the cooking utensil from the heat source.

A hairdryer attachment that diffuses the flow of air.

One who, or that which, diffuses.

Baffle that distributes sound waves evenly

Optical device that distributes the light of a lamp evenly