Joukowsky surge

Named for the scientist Joukowsky. A simplified method for calculating the maximum pressure surge in a fluid-filled pipeline, depending on the closing time of valves or overrun time of pumps (e.g. in case of mains failure) as well as the flow rate, density and wave propagation speed of the fluid and the length of the pipe. Used in pipe structural analysis to determine, for example, the forces of directional changes resulting from a pressure surge.