Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/11422/8597
Especie: Artigo
Título : A unified analytical solution of the steady-state atmospheric diffusion equation
Autor(es)/Inventor(es): Guerrero, Jesús Salvador Pérez
Pimentel, Luiz Claudio Gomes
Oliveira Júnior, José Francisco de
Heilbron Filho, Paulo Fernando Lavalle
Ulke, Ana Graciela
Resumen: Indisponível.
Resumen: A unified analytical solution of the steady-state atmospheric diffusion equation for a finite and semi-infinite/infinite media was developed using the classic integral transform technique (CITT) which is based on a systematized method of separation of variable. The solution was obtained considering an arbitrary mean wind velocity depending on the vertical coordinate (z) and a generalized separable functional form for the eddy diffusivities in terms of the longitudinal (x) and vertical coordinates (z). The examples described in this article show that the well known closed-form analytical solutions, available in the literature, for both finite and semi-infinite/infinite media are special cases of the present unified analytical solution. As an example of the strength of the developed methodology, the Copenhagen and Prairie Grass experiments were simulated (finite media with the mean wind speed and the turbulent diffusion coefficient described by different functional forms). The results indicate that the present solutions are in good agreement with those obtained using other analytical procedures, previously published in the literature. It is important to note that the eigenvalue problem is associated directly to the atmospheric diffusion equation making possible the development of the unified analytical solution and also resulting in the improvement of the convergence behavior in the series of the eigenfunction-expansion.
Materia: Atmospheric diffusion equation
Analytical solution
Integral transform
Associated eigenvalue problem
Materia CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
Unidade de producción: Núcleo Interdisciplinar de Dinâmica dos Fluidos
Editor: Elsevier
Es parte de: Atmospheric Environment
Volumen: 55
Fecha de publicación: 17-mar-2012
DOI: 10.1016/j.atmosenv.2012.03.015
País de edición : Brasil
Idioma de publicación: eng
Tipo de acceso : Acesso Aberto
ISSN: 1352-2310
Aparece en las colecciones: Engenharias

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