Surface flow visualization around competitive swimmers by Tufts Method

Zaïdi, Hanane; Taı̈ar, Redha; Fohanno, S.; Polidori, Guillaume

doi:10.1007/bf03181705

Cited by 4 publications

(2 citation statements)

References 4 publications

(3 reference statements)

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“…Five turbulence models have been tested by Zaidi et al [6] in both a 2D configuration and steady hydrodynamic state. The comparison between these models and experimental results obtained by flow visualization using the tufts method (Zaïdi et al [7]) have revealed that the standard k-ω turbulence model is the most appropriate to predict the 2D flow around the swimmer. More recently, Zaïdi et al [8] have studied the flow past a 3D swimmer geometry using a CFD code.…”

Section: Introductionmentioning

confidence: 99%

Influence of a postural change of the swimmer's head in hydrodynamic performances using 3D CFD

Popa

Arfaoui

Fohanno

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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This study deals with recent researches undertaken by the authors in the field of hydrodynamics of human swimming. The aim of this numerical study was to investigate the flow around the entire swimmer's body. The results presented in this article focus on the combination of a 3D computational fluid dynamics code and the use of the k-ω turbulence model, in the range of Reynolds numbers representative of a swimming level varying from national to international competition. Emphasis is placed on the influence of a postural change of the swimmer's head in hydrodynamic performances, which is directly related to the reduction of overall drag. These results confirm and complete those, less accurate, of a preliminary 2D study recently published by the authors and allow the authors to optimise the swimmer's head position in underwater swimming.

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Section: Introductionmentioning

confidence: 99%

Influence of a postural change of the swimmer's head in hydrodynamic performances using 3D CFD

Popa

Arfaoui

Fohanno

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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“…1a are obtained by using the k-x turbulence model with a 3D Navier-Stokes CFD code for Reynolds numbers about 6.4 9 10 6 . 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.…”

mentioning

confidence: 99%

Visualizations of the flow around a swimmer in turbulent regime

Arfaoui¹,

Popa²,

Fohanno³

et al. 2010

J Vis

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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 10 6 . 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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