Total enthalpy () is a thermodynamic property that represents the total energy content of a fluid per unit mass, taking into account both its internal energy and the energy associated with its velocity. It is a concept commonly used in fluid dynamics, aerodynamics, and thermodynamics to describe the energy state of a flowing fluid.
- is the total enthalpy of the fluid (in joules per kilogram or other appropriate units).
- is the specific enthalpy of the fluid, representing the total energy per unit mass of the fluid that includes its internal energy and the work done against external pressure during a process.
- is the velocity of the fluid.