Eddy diffusivities for the convective boundary layer derived from LES spectral data

Developmental Biology

Michel B. Stefanello¹  Gervasio A. Degrazia¹  Silvana Maldaner⁵  Otavio C. Acevedo¹  Lidiane Buligon³  Silvia B.A. Rolim⁶  Daniela Buske⁴  Umberto Rizza²  Debora R. Roberti¹  Viliam Cardoso¹ 

[1] Departamento de Fisica, Universidade Federal de Santa Maria, Santa Maria, Brazil$$;Bolsista do CNPq - Brazil$$Istituto di Scienzedell’Atmosfera e del Clima, CNR, Lecce, Italy$$;Departamento de Matematica, Universidade Federal de Santa Maria, Santa Maria, Brazil$$;Departamento de Matematica e Estatistica, Universidade Federal de Pelotas, Pelotas, Brazil$$;Bolsista do CNPq - Brazil$$;Programa de Pos-Graduacao em Sensoriamento Remoto, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil$$

关键词: Eddy diffusivities;    Large Eddy Simulation;    Taylor statistical diffusion theory;    convective boundary layer;   

DOI  :  10.5094/APR.2015.068

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

Large Eddy Simulation (LES) spectral data and Taylor statistical diffusion theory are used to obtain Eddy diffusivities in a convective boundary layer. The derivation employs a fitting expression obtained from LES data for the vertical peak frequency. The vertical Eddy diffusivities are well behaved and show similar patterns and magnitudes as those derived from experimental spectral peak frequency data. In addition, this new vertical Eddy diffusivity was introduced into an advection diffusion equation which was solved by Generalized Integral Laplace Transform Technique (GILLT) method and validated with observed contaminant concentration data of the Copenhagen experiment. The results of this new approach are shown to agree with the measurements of Copenhagen.

【 授权许可】

Unknown   

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