| Journal: | Journal of the Brazilian Society of Mechanical Sciences |
| Database: | PERIÓDICA |
| System number: | 000312026 |
| ISSN: | 0100-7386 |
| Authors: | Bocon, Fernando T1 Maliska, Clovis R2 |
| Institutions: | 1Universidade Federal do Parana, Departamento de Engenharia Mecanica, Curitiba, Parana. Brasil 2Universidade Federal de Santa Catarina, Departamento de Engenharia Mecanica, Florianopolis, Santa Catarina. Brasil |
| Year: | 2000 |
| Volumen: | 22 |
| Number: | 1 |
| Pages: | 105-118 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | A non isotropic turbulence model is extended and applied to three dimensional stably stratified flows and dispersion calculations. The model is derived from the algebraic stress model (including wall proximity effects), but it retains the simplicity of the "eddy viscosity" concept of first order models. The "modified k-epsilon" is implemented in a three dimensional numerical code. Once the flow is resolved, the predicted velocity and turbulence fields are interpolated into a second grid and used to solve the concentration equation. To evaluate the model, various steady state numerical solutions are compared with small scale dispersion experiments which were conducted at the wind tunnel of Mitsubishi Heavy Industries, in Japan. Stably stratified flows and plume dispersion over three distinct idealized complex topographies (flat and hilly terrain) are studied. Vertical profiles of velocity and pollutant concentration are shown and discussed. Also, comparisons are made against the results obtained with the standard k-epsilon model |
| Disciplines: | Geociencias, Ciencias de la computación |
| Keyword: | Ciencias de la atmósfera, Dispersión atmosférica, Modelos, Topografía, Flujo, Colinas, Simulación numérica |
| Keyword: | Earth sciences, Computer science, Atmospheric sciences, Atmospheric dispersion, Models, Topography, Flow, Hills, Numerical simulation |
| Full text: | Texto completo (Ver HTML) |
