Le Potentiel de vitesse pour les écoulements de fluides réels : la contribution de Joseph-Louis Lagrange
2007; Société hydrotechnique de France; Volume: 93; Issue: 5 Linguagem: Inglês
10.1051/lhb
ISSN1958-5551
Autores Tópico(s)Ocean Waves and Remote Sensing
ResumoClick to increase image sizeClick to decrease image sizeToday the concept of “potential flow” is too often associated, wrongly, with the notion of ideal, hence inviscid fluid. Herein the original development of Joseph-Louis LAGRANGE is presented. He introduced the velocity potential for real fluid flows, provided that the resultant of the forces derives from a potential. In the same article, LAGRANGE also presented the concept of stream function and the equation of the celerity of a small disturbance in shallow-water. LAGRANGE made an outstanding contribution in 1781 and he was truly ahead of his time.Velocity potentialIrrotational flow motionReal fluidsJoseph-Louis LAGRANGEStream functionWave celerity.
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