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Advisor(s)
Abstract(s)
Nowadays the underwater gliding after the starts and the turns plays a major role in the overall swimming
performance. Hence, minimizing hydrodynamic drag during the underwater phases should be a main aim during
swimming. Indeed, there are several postures that swimmers can assume during the underwater gliding, although
experimental results were not conclusive concerning the best body position to accomplish this aim. Therefore, the
purpose of this study was to analyse the effect in hydrodynamic drag forces of using different body positions during
gliding through computational fluid dynamics (CFD) methodology. For this purpose, two-dimensional models of the
human body in steady flow conditions were studied. Two-dimensional virtual models had been created: (i) a prone
position with the arms extended at the front of the body; (ii) a prone position with the arms placed alongside the trunk;
(iii) a lateral position with the arms extended at the front and; (iv) a dorsal position with the arms extended at the front.
The drag forces were computed between speeds of 1.6 m/s and 2 m/s in a two-dimensional Fluent® analysis. The
positions with the arms extended at the front presented lower drag values than the position with the arms aside the
trunk. The lateral position was the one in which the drag was lower and seems to be the one that should be adopted
during the gliding after starts and turns.
Description
Keywords
Tests and testing Computational fluid dynamics Technique Biomechanics Numerical simulations Swimming gliding
Citation
Marinho, D.A.; Barbosa, Tiago M.; Rouboa, A.I.; Silva, A.J. (2011). The hydrodynamic study of the swimming gliding: a two-dimensional computational fluid dynamics (CFD) analysis. Journal of Human Kinetics. ISSN 1640-5544. 29, p. 49-57
Publisher
Acad Physical Education-Katowice