Article dans une revue avec comité de lecture

Visualizations of the flow around a swimmer in turbulent regime
Journal of Visualization, Vol. 14 (1), p. 3 – 4. 2011

par   Ahlem ARFAOUI , Catalin Viorel POPA , Stéphane FOHANNO , R. Taïar , Guillaume POLIDORI

Résumé :

This short paper presents a continuation of earlier researches (Zaïdi et al. 2009) developed by the authors in the field of computational fluid dynamics (CFD) simulations of underwater swimming. The dynamics of the surface flow presented in Fig. 1a are obtained by using the k-x turbulence model with a 3D Navier–Stokes CFD code for Reynolds numbers about 6.4 9 106. The model has been validated by flow visualization using the tufts method (Zaïdi et al. 2008 ; Tagori 1984) where flow separation and reattachment areas are clearly evidenced, e.g. at the tip of the nose with its reattachment on the breast and starting at lower part of the back with its reattachment on the upper part of the buttocks (Fig. 1b). Moreover, one may observe many largescale vortices on both sides of the head, at the lower back level and in the back of the buttocks.

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