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Hybrid Methods in Engineering

ISSN Print: 1099-2391
ISSN Online: 2641-7359

Archives: Volume 1, 1999 to Volume 4, 2002

Hybrid Methods in Engineering

DOI: 10.1615/HybMethEng.v1.i4.10
19 pages

SIMULATION OF COPENHAGEN TRACER DIFFUSION EXPERIMENT BY MEANS OF A LAGRANGIAN PARTICLE MODEL

J. C. Carvalho
Institute Nacional de Pesquisas Espaciais (INPE), Caixa Postal 515, 12201-970 São José dos Campos - SP, Brazil

Scientific Journal Referee
2001 - Present Journal: Ciencia e Natura
2005 - Present Journal: Atmospheric Environment
2003 - Present Journal: Revista Brasileira de Meteorologia
2004 - Present Journal: Water, Air and Soil Pollution
2006 - Present Journal: Revista Brasileira de Geofisica
2006 - Present Journal: Journal of Applied Meteorology (Boston)
2005 - Present Journal: Journal of Computational Physics
2004 - Present Journal: Environmental Modeling & Software
2007 - Present Journal: Atmospheric Research (0169-8095)
Gervasio Annes Degrazia
Departamento de Fisica, Universidade Federal de Santa Maria, Santa Maria; Consiglio Nazionale delle Ricerche, lstituto di Cosmo-Geofisica, Torino, Italy; and Universidade de Sao Paulo, Institute Astrondmico e Geofisico, Sao Paulo, Brazil
Domenico Anfossi
Istituto di Cosmogeofisica del CNR, Corso Fiume4, 10133, Torino, Italy
S. Trini Castelli
Istituto di Cosmogeofisica del CNR, Corso Fiume4, 10133, Torino, Italy

ABSTRACT

Using simulations with a stochastic Lagrangian model of turbulent diffusion, we have studied the dispersion of contaminants in the atmospheric boundary layer when both thermal and mechanical turbulent forcing terms are present. The model is based on a generalized form of the Langevin equation and in the vertical direction the probability density function (PDF) is non-Gaussian and represented by two different PDFs. By employing the Copenhagen tracer diffusion experiment, the model performances are evaluated against observed ground-level concentrations.