Comparison between Eulerian and Lagrangian semi-analytical models to simulate the pollutant dispersion in the PBL

In this work we display a numerical comparison, under statistical and computational point of view, between semi-analytical Eulerian and Lagrangian dispersion models to simulate the ground-level concentration values of a passive pollutant released from a low height source. The Eulerian approach is ba...

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Bibliographic Details
Published in:Applied mathematical modelling 2007, Vol.31 (1), p.120-129
Main Authors: Carvalho, Jonas C., Vilhena, Marco T., Moreira, Davidson M.
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric pollution
Eulerian model
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Lagrangian model
Laplace transform technique
Model comparison
Model evaluation
Physics
Picard’s Iterative Method
Pollution
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
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Summary:In this work we display a numerical comparison, under statistical and computational point of view, between semi-analytical Eulerian and Lagrangian dispersion models to simulate the ground-level concentration values of a passive pollutant released from a low height source. The Eulerian approach is based on the solution of the advection–diffusion equation by the Laplace transform technique. The Lagrangian approach is based on solution of the Langevin equation through the Picard’s Iterative Method. Turbulence inputs are calculated according to a parameterization capable of generating continuous values in all stability conditions and in all heights of the Planetary Boundary Layer (PBL). Numerical simulations and comparisons show a good agreement between predicted and observed concentrations values. The comparison reveals the main advantages and disadvantages between the models.
ISSN:0307-904X
DOI:10.1016/j.apm.2005.08.009