Free Access
| Issue |
La Houille Blanche
Number 8, Décembre 1993
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|---|---|---|
| Page(s) | 527 - 537 | |
| DOI | https://doi.org/10.1051/lhb/1993043 | |
| Published online | 01 October 2009 | |
La Houille Blanche, N°8 (Décembre 1993), pp. 527-537
Essai critique sur la diffusion numérique dans un algorithme d'écoulement transitoire à surface libre
Critical test about numerical diffusion of transient flow algorithm with free surface
Institut de mécanique des fluides Institut national polytechnique de Toulouse
Abstract
In this paper, a critical study of the numerical diffusion associated to an hyperbolic-type operator governing transient free surface flow, is presented. The numerical diffusion is estimated through the discretisation of the simplified governing equations, using finite differences implicit scheme. The diffusion is due to the choice of the space and time steps when using implicit scheme.The interpretation of the results is made using the existing similarity with a simple oscillating system.
© Société Hydrotechnique de France, 1993