A two dimensional numerical model of primary pollutant emitted from an urban area source with mesoscale wind, dry deposition and chemical reaction

Lakshminarayanachari, K.; Pai, K.L. Sudheer; Prasad, M. Siddalinga; Pandurangappa, C

doi:10.5094/apr.2013.011

Cited by 12 publications

(6 citation statements)

References 21 publications

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“…Thus, the dispersion of air pollutants from source areas into the atmosphere is governed by the processes of molecular diffusion and convection [29] and this depends on climatic factors such as wind speed, temperature inversions and dry deposition. It is also evident that NH 3 concentrations decreased with distance from the plant as NH 3 gas was nearly at detection limit concentration quantities at the control point.…”

Section: Resultsmentioning

confidence: 99%

Selected Gaseous Pollutants Level in Ambient Air Around the Vicinity of Chemical Industry in Kwekwe, Zimbabwe

Simbi¹,

Opeolu²,

Olatunji³

2017

Asian J. Chem.

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Section: Resultsmentioning

confidence: 99%

Selected Gaseous Pollutants Level in Ambient Air Around the Vicinity of Chemical Industry in Kwekwe, Zimbabwe

Simbi¹,

Opeolu²,

Olatunji³

2017

Asian J. Chem.

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“…is the diffusivity term expressed in terms of power law as (9) Where is Von-Karmen constant, is the friction velocity and is the turbulence intensity.…”

Section: Andmentioning

confidence: 99%

Analytical Approach For Air pollution Emitted From Line Source With Chemical Reaction And Wet Deposition

Bhaskar¹,

Lakshminarayanachari²,

Pandurangappa³

2019

IJRAT

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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.

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“…Gravitational settling velocity and leakage velocity of contaminants, that not consider wet deposition, have been studied [7]. Chemical reactive of pollutants with different shapes of wind in area source using numerical model has been studied [8]. Atmospheric diffusion equation using longitudinal wind speed depending on source distance was investigated [9].…”

Section: Introductionmentioning

confidence: 99%

Analytical solution of diffusion equation under chemical reaction and wet deposition from line Source

Essa

Mosallem

Taha

2022

J. Phys.: Conf. Ser.

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The pollutants from the environment are absorbed by wet deposition which increases the pollutants transport. To create and produce different substances, the constituent atoms of the reactants should be rearranged by the chemical reaction. The introduced theoretical model demonstrate the dispersal of pollutants inherited from point and line source without and with both wet deposition and chemical reaction, respectively. The advection-diffusion equation is solved. Taking the wind speed is a function of downwind distance, lateral eddy diffusivity is a function of wind speed and vertical eddy diffusivity is a function of both wind speed and vertical height of power “z”. In this paper the variable separable method and Hankel transform are used to get the concentration from point and line source. Predicted concentration of pollutants in unstable condition is done. Variation concentrations of both observed and predicted of radioactive Iodine135 (I-135), inside Research Reactor at Inshas Egyptian Atomic Energy Authority, in unstable condition is shown without chemical reaction and wet deposition. It is discovered that the proposed model is a good harmony with observed concentrations data and the proposed data inside a factor of two. Also, studying the effect of wet deposition and chemical reaction on concentration of air contaminants of line source is analysed.

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A two dimensional numerical model of primary pollutant emitted from an urban area source with mesoscale wind, dry deposition and chemical reaction

Cited by 12 publications

References 21 publications

Selected Gaseous Pollutants Level in Ambient Air Around the Vicinity of Chemical Industry in Kwekwe, Zimbabwe

Selected Gaseous Pollutants Level in Ambient Air Around the Vicinity of Chemical Industry in Kwekwe, Zimbabwe

Analytical Approach For Air pollution Emitted From Line Source With Chemical Reaction And Wet Deposition

Analytical solution of diffusion equation under chemical reaction and wet deposition from line Source

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