Thermodynamics

Thermodynamics

The science of energy and its ability to cause changes.

Industry: Physics

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Thermodynamics

pressure recovery factor

Physics; Thermodynamics

A measure of a diffuser's ability to increase the fluid pressure. It is expressed as the ratio of the actual stagnation pressure of a fluid at the diffuser exit relative to the maximum possible ...

The required energy input in the form of heat for many industrial processes. The process heat is often obtained as heat transfer from high-pressure, high-temperature steam. Some industries that rely ...

cooling pond

Physics; Thermodynamics

A large lake open to the atmosphere into which warm water containing waste heat is pumped. Heat transfer from the pond surface to the atmosphere is very slow which requires an area 20 times the size ...

stagnation enthalpy

Physics; Thermodynamics

The total energy of a flowing fluid stream per unit mass which represents the enthalpy of a fluid when it is brought to rest adiabatically with no work. The stagnation enthalpy is equal to the static ...

boundary work

Physics; Thermodynamics

The work associated with the expansion or compression of a gas in a piston-cylinder device. Boundary work is the area under the process curve on a P-V diagram equal, in magnitude, to the work done ...

polytropic process

Physics; Thermodynamics

A process in which pressure and volume are often related by PVn= C, where n and C/ are constants, during expansion and compression processes of real gases.

choked flow

Physics; Thermodynamics

A fluid dynamic condition in which the mass flow in a nozzle reaches a maximum value through the minimum flow area. This happens when the flow properties are those required to increase the fluid ...