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Comptes Rendus Physique
Volume 6, n° 4-5
pages 467-486 (mai-juin 2005)
Doi : 10.1016/j.crhy.2005.05.001
Vortex methods and their application to trailing wake vortex simulations
Les méthodes vortex et leur application à la simulation des sillages tourbillonnaires
 

Grégoire Winckelmans , Roger Cocle, Louis Dufresne, Raphaël Capart
Université catholique de Louvain (UCL), Mechanical Engineering Department, Division TERM and Center for Systems Engineering and Applied Mechanics (CESAME), 1348 Louvain-la-Neuve, Belgium 

Corresponding author.
Abstract

Vortex methods are competitive for simulating incompressible unsteady flows, because they have negligible dispersion error and good energy conservation. The various methods are presented, including the recent developments: particle redistribution, diffusion, relaxation (by projection), efficient solvers (fast multipole method, vortex-in-cell method, hybrid method) and parallel computer implementations. Examples relating to wing/aircraft trailing wake vortices are presented: 2-D and 3-D, inviscid and viscous, direct numerical simulation and large eddy simulation. We consider wake roll-ups, vortex tube dynamics, 3-D instabilities and the complexity/turbulence they produce. A vortex system in ground effects is also presented. To cite this article: G. Winckelmans et al., C. R. Physique 6 (2005).

The full text of this article is available in PDF format.
Résumé

Les méthodes vortex sont compétitives pour la simulation dʼécoulements incompressibles et instationnaires, car elles ont peu de dispersion et de bonnes propriétés de conservation de lʼénergie. Les diverses méthodes sont présentées, incluant les développements récents : redistribution des particules, diffusion, relaxation (par projection), solveurs efficaces (méthode multipole rapide, méthode particules-grille, méthode hybride) et implémentation sur ordinateurs parallèles. Des examples sont présentés concernant lʼapplication aux sillages tourbillonnaires dʼailes/avions : 2-D et 3-D, non-visqueux et visqueux, simulation directe et simulation des grandes échelles. On considère des enroulements, de la dynamique de tubes tourbillon, des instabilités 3-D et la complexité/turbulence quʼelles produisent. Un système de tourbillons en effet de sol est aussi présenté. Pour citer cet article : G. Winckelmans et al., C. R. Physique 6 (2005).

The full text of this article is available in PDF format.

Keywords : Lagrangian methods, Vortex particle methods, Vortex-in-cell methods, Unsteady flows, Turbulent flows, Direct numerical simulation, Large-eddy simulation

Mots-clés : Méthodes lagrangiennes, Méthodes de particules tourbillon, Méthodes particules-grille, Écoulements instationnaires, Écoulements turbulents, Simulation numérique directe, Simulation des grandes échelles




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