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The 3D CFD study of gliding swimmer on passive hydrodynamics drag
Mantha, Vishveshwar Rajendra; Marinho, Daniel Almeida; Silva, Antonio Jose; Rouboa, Abel Ilah.
  • Mantha, Vishveshwar Rajendra; University of Trás-os-Montes and Alto Douro. Department of Mechanical Engineering. Vila Real. PT
  • Marinho, Daniel Almeida; University of Trás-os-Montes and Alto Douro. Department of Mechanical Engineering. Vila Real. PT
  • Silva, Antonio Jose; University of Trás-os-Montes and Alto Douro. Department of Mechanical Engineering. Vila Real. PT
  • Rouboa, Abel Ilah; University of Trás-os-Montes and Alto Douro. Department of Mechanical Engineering. Vila Real. PT
Braz. arch. biol. technol ; 57(2): 302-308, Mar.-Apr. 2014. ilus, graf
Artigo em Inglês | LILACS | ID: lil-705753
ABSTRACT
The aim of this study was to analyze the effect of depth on the hydrodynamic drag coefficient during the passive underwater gliding after the starts and turns. The swimmer hydrodynamics performance was studied by the application of computational fluid dynamics (CFD) method. The steady-state CFD simulations were performed by the application of k - omega turbulent model and volume of fluid method to obtain two-phase flow around a three-dimensional swimmer model when gliding near water surface and at different depths from the water surface. The simulations were conducted for four different swimming pool size, each with different depth, i.e., 1.0, 1.5, 2.0 and 3.0 m for three different velocities, i.e., 1.5, 2.0 and 2.5 m/s, with swimmer gliding at different depths with intervals of 0.25 m, each starting from the water surface, respectively. The numerical results of pressure drag and total coefficients at individual average race velocities were obtained. The results showed that the drag coefficient decreased as depth increased, with a trend toward reduced fluctuation after 0.5m depth from the water surface. The selection of the appropriate depth during the gliding phase should be a main concern of swimmers and coaches.


Texto completo: DisponíveL Índice: LILACS (Américas) Idioma: Inglês Revista: Braz. arch. biol. technol Assunto da revista: Biologia Ano de publicação: 2014 Tipo de documento: Artigo / Documento de projeto País de afiliação: Portugal Instituição/País de afiliação: University of Trás-os-Montes and Alto Douro/PT

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Texto completo: DisponíveL Índice: LILACS (Américas) Idioma: Inglês Revista: Braz. arch. biol. technol Assunto da revista: Biologia Ano de publicação: 2014 Tipo de documento: Artigo / Documento de projeto País de afiliação: Portugal Instituição/País de afiliação: University of Trás-os-Montes and Alto Douro/PT