| Revista: | Journal of the Brazilian Society of Mechanical Sciences |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312040 |
| ISSN: | 0100-7386 |
| Autores: | Llagostera, Jorge1 Figueiredo, Jose R |
| Instituciones: | 1Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica, Campinas, Sao Paulo. Brasil |
| Año: | 2000 |
| Volumen: | 22 |
| Número: | 4 |
| Paginación: | 583-597 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | Mixed convection on the flow past a heated length and past a porous cavity located in a horizontal wall bounding a saturated porous medium is numerically simulated. The cavity is heated from below. The steady-state regime is studied for several intensities of the buoyancy effects due to temperature variations. The influences of Péclet and Rayleigh numbers on the flow pattern and the temperature distributions are examined. Local and global Nusselt numbers are reported for the heated surface. The convective-diffusive fluxes at the volume boundaries are represented using the UNIFAES, Unified Finite Approach Exponential-type Scheme, with the Power-Law approximation to reduce the computing time. The conditions established by Rivas for the quadratic order of accuracy of the central differencing to be maintained in irregular grids are shown to be extensible to other quadratic schemes, including UNIFAES, so that accuracy estimates could be obtained |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Termodinámica y física estadística, Medio poroso, Calor, Flujo, Convección, Cavidades, Mallas |
| Keyword: | Physics and astronomy, Thermodynamics and statistical physics, Porous media, Heat, Flow, Convection, Cavities, Grids |
| Texto completo: | Texto completo (Ver HTML) |
