Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other.

In physics and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids/liquids and gases.

A process to remove sulphur dioxide from exhaust gases in power plants that use hydrocarbons as a fuel.

Gas that is expelled from an engine via a flue.

A duct for smoke and waste gases produced by a fire, a gas heater, a power station, or other fuel-burning installation.

Flow separation or boundary layer separation is the detachment of a boundary layer from a surface into a wake.

The nature of fluid flow in any situation.

Component that reduces fluid flow to a specified rate (such as 4 gpm).

A device that indicates water flow.

A packaged set of circulating pumps mounted in a cabinet, which often includes valves and ports for flushing/purging, antifreeze charging (if used), and loop pressurization (if a pressurized flow center is used).

A flow battery, or redox flow battery (after reduction–oxidation), is a type of electrochemical cell where chemical energy is provided by two chemical components dissolved in liquids that are pumped through the system on separate sides of a membrane.

Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.

Wind turbines that are mounted on floating structures which are then tethered to the sea bed.

Floating solar refers to a solar power production installation mounted on a structure that floats on a body of water, typically an artificial basin or a lake.

A floating hydroelectricity plant that does not require the creation of a water storage area. The float is tethered in the flowing water whereby a small turbine is under the float section.

A floating production storage and offloading unit is a floating vessel used by the offshore oil and gas industry for the production and processing of hydrocarbons, and for the storage of oil.

Power plants that are constructed on barges or ships and can be towed or sailed to a location and connected to the power grid.

Float voltage is the voltage at which a battery is maintained after being fully charged to maintain that capacity by compensating for self-discharge of the battery.

A gas, multi-fuel, or liquid fuel power plant in combination with a steam turbine combined cycle

Power plants utilising internal combustion engine generator sets providing rapid startup and shutdown being able to operate in multiple modes, from efficient baseload power production to dynamic system balancing in combination with, for example, wind or solar power.