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Wet deposition acts crucial task in the environment to supply nutrients and toxic essence to terrestrial and aquatic surroundings. Wet deposition absorbs pollutants from the environment and adds drastically to their pollutants transport. A comprehensive analytical model for the distribution of air pollutants with chemical reaction and wet deposition for line source is developed. This analytical model explains about diffusion of primary pollutants transmitted from line source in an urban area in the existence of chemical reaction and wet deposition. We have considered the large scale wind as constant and eddy diffusivity is treated as function of vertical height z. In this paper, we used variable separable method, orthogonality condition of Bessel function and the special functions method. Chemical reaction and wet deposition escalate the diffusion of pollutants in the environment in the urban area towards right side of centre of heat Island. The pollutant concentration is less in magnitude for neutral atmosphere when compared to the stable atmosphere situation. This work reveals that pollutant concentration is less in the presence of wet deposition an urban area.

Abstract

In this paper, numerical simulations are presented to understand the influence of inclination angle of a tilted parallelogrammic enclosure. The upper and lower boundaries of the enclosure are treated as thermally insulated; right wall is uniform cooled while the left wall is non-uniformly heated with either sinusoidal or linear thermal profiles. Using Darcy law, the momentum equations are modeled and unsteady energy equation is considered. The model equations are numerically solved using finite difference method, in particular, using ADI and SLOR methods. Based on standard coordinate transformations, the governing equations are transformed to rectangular shaped enclosure computational domain. In this analysis, due to large number parameters, the inclination angle of the enclosure is fixed. The flow and thermal processes are depicted through streamlines and isotherms, while the thermal transport rates are illustrated through Nusselt number profiles. Numerical simulations capture the effects of side wall inclination angle and non-uniform thermal conditions on the flow and thermal patterns, heat transport rates for various parametric ranges of the problem.