| Revista: | Brazilian archives of biology and technology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000374455 |
| ISSN: | 1516-8913 |
| Autores: | Mantha, Vishveshwar Rajendra1 Marinho, Daniel Almeida2 Silva, Antonio Jose3 Rouboa, Abel Ilah4 |
| Instituciones: | 1Universidade de Tras-os-Montes e Alto Douro, Departamento de Engenharia Mecanica, Vila Real. Portugal 2Universidade de Tras-os-Montes e Alto Douro, Centro de Investigacao em Desporto, Saude e Desenvolvimento Humano, Vila Real. Portugal 3Universidade de Tras-os-Montes e Alto Douro, Departamento de Ciencias do Desporto, Vila Real. Portugal 4Universidade da Beira Interior, Departamento de Ciencias do Desporto, Covilha, Castelo Branco. Portugal |
| Año: | 2014 |
| Periodo: | Mar-Abr |
| Volumen: | 57 |
| Número: | 2 |
| Paginación: | 302-308 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | 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 |
| Disciplinas: | Física y astronomía, Ciencias de la computación |
| Palabras clave: | Dinámica de fluidos, Computación, Dinámica de fluidos computacional (CFD), Arrastre pasivo |
| Keyword: | Physics and astronomy, Computer science, Fluid dynamics, Computing, Computational fluid dynamics (CFD), Passive Drag, Streamline gliding position, Glide depth |
| Texto completo: | Texto completo (Ver PDF) |
