Pollutant transport in a Convective Boundary Layer with LES

Autor(es)

Edson Pereira Marques Filho ^[1] ; Amauri Pereira de Oliveira ^[2] ; Umberto Rizza ^[3] ; Hugo Abi Karam ^[4]

Afiliação do(s) autor(es)

^[1] Federal University of Rio de Janeiro. Institute of Geosciences. Department of Meteorology - Brasil

^[2] University of São Paulo. Institute of Astronomy, Geophysics and Atmospheric Sciences. Department of Atmospheric Sciences - Brasil

^[3] Istituto di Scienze dell'Atmosfera e del Clima - Itália

^[4] Federal University of Rio de Janeiro. Institute of Geosciences. Department of Meteorology - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Revista Brasileira de Geofísica; v. 24, n. 4, p. 547-557, 2006-12-00.

Resumo

This work describes the statistical properties of a Convective Boundary Layer (CBL) and the associated turbulent transport of a passive and inert pollutant, continuously emitted in the atmosphere by an area-source on the surface. The CBL flow and properties are simulating with a Large Eddy Simulation (LES) model. To assure the development of a quasi-steady turbulent regime, both the stability parameter and the Turbulent Kinetic Energy (TKE) criteria were applied to LES with similar results. The vertical structure of the pollutant concentration, potential temperature associated with vertical turbulent fluxes and variances are consistent with the mixed layer similarity predictions. Both the pollutant concentration and the vertical wind skewness fluctuations are associated with the updrafts and downdrafts distributions, emphasizing the importance of the entrainment in the cleaning of the CBL. (AU)

• Processo FAPESP: 98/15402-5 - Túnel de vento de camada limite atmosférica
• Beneficiário: Marcos Tadeu Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários