Author(s)

Y.-M. Scolan & H. Le Ny

Abstract

Viscous flow visualization around cylinders of arbitrary shape by a vortex method Y.-M. Scolan" & H. Le Ny& "Principia R & D, Zone Portuaire du Bregaillon, 83507 La seyne Sur Mer, France **France America's Cup Technologies, Immeuble Petra, 06560 Valbonne, France I. Introduction Viscous incompressible flows around cylinders of arbitrary shape are simulated by using a Mixed Euler-Lagrange Method: the Vortex-In-Cell Method is combined with the Operator Splitting Technique and a Random Method. The vorticity field is represented by a set of discrete vortices. The latter are transported in the fluid by solving the Navier Stokes Equations in either subcritical or post-supercritical flow regimes. The main feature of this numerical model is the generation of discrete vortices all around each body surface. A visualization of the resulting flow field can be done by plotting the path of each vortex -considered here as a lagrangian particle- over one time step. By

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