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The Prony equation is a historically important equation in hydraulics, used to calculate the head loss due to friction within a given run of pipe. It is an empirical equation developed by Frenchman Gaspard de Prony in the 19th century:
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where hf is the head loss due to friction, calculated from: the ratio of the length to diameter of the pipe L/D, the velocity of the flow V, and two empirical factors a and b to account for friction.
This equation has been supplanted in modern hydraulics by the Darcy-Weisbach equation, which used it as a starting point.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Prony_equation". A list of authors is available in Wikipedia.|