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Energy of a Flowing Fluid

A flowing fluid in motion possesses three types of energy shown in Table 1.
 
Table 1
Pressure energy
Potential energy
Kinetic energy
It is the energy possessed by a liquid by virtue of its pressure. It is the measure of work done in pushing the liquid against pressure without imparting any velocity to it.
It is the energy possessed by liquid by virtue of its height or position above the surface of earth or any reference level taken as zero level.
It is the energy possessed by a liquid by virtue of its motion or velocity.
Pressure energy of the liquid = PV
Potential energy of the liquid = mgh
Kinetic energy of the liquid = 51251.png 
Pressure energy per unit mass of the liquid = P/ρ
Potential energy per unit mass of the liquid = gh
Kinetic energy per unit mass of the liquid = 51244.png 
Pressure energy per unit volume of the liquid P
Potential energy per unit volume of the liquid ρgh
Kinetic energy per unit volume of the liquid = 51238.png




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