What enthalpy indicates?

The total energy of a compressible system consists of kinetic, potential and internal energy but in case of flowing fluid, the fluid possesses another form of energy which is called as flow energy (P/?). Then the total energy of a flowing fluid on the unit mass basis becomes eflowing = u + (P/?) + ke + pe …. (kJ/kg) = h+ ke + pe ….(kJ/kg) Where, h=u + pv = u+ P/?
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