Application of a non isotropic turbulence model to stable atmospheric flows and dispersion over 3D topography
Título del documento: Application of a non isotropic turbulence model to stable atmospheric flows and dispersion over 3D topography
Revista: Journal of the Brazilian Society of Mechanical Sciences
Base de datos: PERIÓDICA
Número de sistema: 000312026
ISSN: 0100-7386
Autores: 1
2
Instituciones: 1Universidade Federal do Parana, Departamento de Engenharia Mecanica, Curitiba, Parana. Brasil
2Universidade Federal de Santa Catarina, Departamento de Engenharia Mecanica, Florianopolis, Santa Catarina. Brasil
Año:
Volumen: 22
Número: 1
Paginación: 105-118
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental
Resumen en inglés 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
Disciplinas: Geociencias,
Ciencias de la computación
Palabras clave: 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
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