An efficient algorithm for solving a multi-layer convection-diffusion problem applied to air pollution problems

doi:10.1016/j.advengsoft.2013.06.010

2013-11-01

PRE

L. Ferragut

María Isabel Asensio Sevilla *

José Manuel Cascón Barbero

Diego Prieto-Herráez

Joaquín Ramirez

DOI：10.1016/j.advengsoft.2013.06.010

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摘要

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An urban scale Eulerian non-reactive multilayer air pollution model is proposed describing convection, turbulent diffusion and emission. A mass-consistent wind field model developed by authors is included in the air pollution model. An Adaptive Finite Element Method with characteristics in the horizontal directions and Finite Differences in the vertical direction using splitting techniques is proposed to numerically solve the corresponding PDE problem. A parallel version of the algorithm improves the precision of the solution keeping computation time below real time of simulation. A numerical example illustrates the whole problem. (C) 2013 Elsevier Ltd. All rights reserved.

Keyword:

Air pollution modeling

Splitting methods

Adaptive Finite Element Method

Parallel algorithm

Parabolic convection-diffusion PDE

PDE numerical methods