The flow work equation is fundamental in fluid mechanics, particularly in the study of thermodynamics and energy transfer within fluid flow systems. The flow work equation is given by:

Where:

• Wf​ is the flow work, measured in energy per unit mass,
•  is the pressure exerted by the fluid, typically in Pascals (Pa) or any pressure unit,
• $\Delta V$ is the change in specific volume of the fluid, measured in volume per unit mass.