| Revista: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000420638 |
| ISSN: | 0001-3765 |
| Autores: | Soares, Daniel V1 Bitencourt, Marcelo C2 Loureiro, Juliana B.R3 Silva Freire, Atila P3 |
| Instituciones: | 1Agencia Nacional de Aviacao Civil, Brasilia, Distrito Federal. Brasil 2Petroleo Brasileiro S.A., Centro de Pesquisa, Rio de Janeiro. Brasil 3Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Rio de Janeiro. Brasil |
| Año: | 2018 |
| Periodo: | Mar |
| Volumen: | 90 |
| Número: | 1 |
| Paginación: | 573-590 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The present work investigates the role of different treatments of the lower boundary condition on the numerical prediction of bubbly flows. Two different wall function formulations are tested against experimental data obtained for bubbly boundary layers: (i) a new analytical solution derived through asymptotic techniques and (ii) the previous formulation of Troshko and Hassan (IJHMT, 44, 871-875, 2001a). A modified k-e model is used to close the averaged Navier-Stokes equations together with the hypothesis that turbulence can be modelled by a linear superposition of bubble and shear induced eddy viscosities. The work shows, in particular, how four corrections must the implemented in the standard single-phase k-e model to account for the effects of bubbles. The numerical implementation of the near wall functions is made through a finite elements code |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería mecánica, Turbulencia, Flujo de burbujas, Predicción numérica |
| Keyword: | Mechanical engineering, Turbulence, Bubbly flow, Numerical prediction |
| Texto completo: | Texto completo (Ver HTML) |
