| Autor: |
Ramos, R. J., Mantha, V. R., Novais, M. L., Rouboa, A. l., Silva, A. J., Marinho, D. A. |
| Zdroj: |
Motricidade; 2012 supplement, Vol. 8, p57-65, 9p |
| Abstrakt: |
The aim of this study was to analyze the effect of depth on the hydrodynamic drag coefficient during the passive underwater gliding after starts and turns. For this analysis, it was used the methodology of Computational Fluid Dynamics, through the software ANSYS® FLUENT®. A real three-dimensional model of an elite swimmer in the streamlined position was modeled. This model was obtained through a computerized axial tomography of the full body. The simulations were conducted for depths of 0, .25, .50, .75 and 1.0 m, with three different speeds: 1.5, 2.0 and 2.5 m/s. The results showed that drag coefficient decreased as depth increased, with a trend toward stabilization of this value after .75 m deep. However, at 0 m depth, the value of drag coefficient is lower than at 1 m deep. There was also a decrease in drag coefficient due to speed increase. These data seem to suggest that the selection of the appropriate depth during the gliding phase should be a main concern of swimmers and coaches. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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