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The Chézy Formula is a semi-empirical resistance equation [1] [2] which estimates mean flow velocity in open channel conduits. [3] The relationship was conceptualized and developed in 1768 by French physicist and engineer Antoine de Chézy (1718–1798) while designing Paris's water canal system.
Chézy Formula for open channel flow Antoine de Chézy (1 September 1718 – 5 October 1798), also called Antoine Chézy , was a French physicist and hydraulics engineer who contributed greatly to the study of fluid mechanics and designed a canal for the Paris water supply. [ 1 ]
1713 – Antoine Parent introduces the concept of shear stress. [12] 1714 – Daniel Gabriel Fahrenheit develops the mercury-in-glass thermometer along the Fahrenheit temperature scale. [1] 1718–1719 – James Jurin writes the law of capillary action, known as Jurin's law. 1727 – Leonhard Euler introduces linear elasticity and the Young's ...
Antoine-Léonard de Chézy (1773–1832), French orientalist; Helmina von Chézy (1783–1856), German journalist, poet and playwright; Communes in France. Chézy, Allier, in the Allier department; Chézy-en-Orxois, in the Aisne department; Chézy-sur-Marne, in the Aisne department; Other. Chézy formula, for river flows
Most charts or tables indicate the type of friction factor, or at least provide the formula for the friction factor with laminar flow. If the formula for laminar flow is f = 16 / Re , it is the Fanning factor f, and if the formula for laminar flow is f D = 64 / Re , it is the Darcy–Weisbach factor f D.
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The wall shear stress τ is dependent on the flow velocity u, they can be related by using e.g. the Darcy–Weisbach equation, Manning formula or Chézy formula. Further, equation ( 1 ) is the continuity equation , expressing conservation of water volume for this incompressible homogeneous fluid.
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