Deutsch: Fluid / Español: Fluido / Português: Fluido / Français: Fluide / Italiano: Fluido
In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress. Fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids.
In an industrial or industry context, "fluid" usually refers to a substance that flows and changes shape readily, such as liquids or gases. Some examples of fluids commonly used in industries include:
- Water - used for cooling, cleaning, and transporting materials.
- Oil - used as a lubricant and as a fuel in power plants and vehicles.
- Air - used for cooling and ventilating, as well as for pneumatic power transmission.
- Hydraulic fluids - used in hydraulic systems to transmit power and force.
- Natural gas - used as a fuel for heating, cooking, and generating electricity.