Continuity equation

The continuity equation is one of the fundamental equations applied in fluid mechanics. It defines the conservation per unit of time of a flow volume through a given cross-section. For fluid flowing through a pipe, the flow velocity is inversely proportional to the pipe cross-sectional area.

The continuity equation stipulates that the sum of all flow volumes entering a defined space (positive sign) equals the sum of those leaving it (negative sign).

  

  

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