Stagnation enthalpy
Stagnation Enthalpy or total enthalpy () is the enthalpy of a flow at a stagnation point. It is the enthalpy a flow would possess if brought to rest (zero velocity) isentropically from velocity .
where is enthalpy, and is velocity.
Stagnation enthalpy has units of energy, such that if enthalpy is thought of as the energy associated with the temperature plus the energy associated with the pressure, the stagnation enthalpy adds a term associated with the kinetic energy of the fluid mass.
See also
For a definition of stagnation enthalpy see: http://ocw.mit.edu/ans7870/16/16.unified/thermoF03/chapter_6.htm