A Study On Numerical Model Of Atmospheric Pollutants With Variable Wind Velocity And Eddy-Diffusivity

Abstract

In this paper, a two-dimensional time-dependent numerical model of atmospheric pollutants for an area source of steady emission with variable wind velocity and eddy-diffusivity is presented to simulate the dispersion processes of gaseous inert air pollutants in an urban area. The simplest area source model is the so-called box model, in which the pollutants are assumed to be completely mixed within a single box, covering the city and extends upward to the mixing height. Ragland (1973) developed a multiple box model for dispersion of air pollutants from an area source. Hameed (1975), discussed modeling of urban air pollution. Shieh (1977) developed a generalized urban air pollution model and applied to the study of SO₂ distribution. Lebedeff and Hameed studied atmospheric transport over area sources by an integral method. Tennekes has attempted through the box model to answer the pollution control during stagnation Episode.