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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.
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]
1747 – Jean le Rond d'Alembert's formula for the solutions of the wave equation in a string gets published. [14] 1752 – D'Alembert show an inconsistency of treating fluids as inviscid incompressible fluids, known as d'Alembert's paradox. 1757 – Euler introduces the Euler equations of fluid dynamics for incompressible and non-viscous flow.
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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If more than one formula is applicable in the flow regime under consideration, the choice of formula may be influenced by one or more of the following: Required accuracy; Speed of computation required; Available computational technology: calculator (minimize keystrokes) spreadsheet (single-cell formula) programming/scripting language (subroutine).