ISJ Theoretical & Applied Science 02(106) 2022

Philadelphia, USA

Karshiev, D. A., Muradov, F. A., & Shirinov, V. N.

Numerical solution of the problem of harmful emissions spread in the atmosphere by the method of splitting into physical processes.

Full Article: PDF

Scientific Object Identifier: http://s-o-i.org/1.1/TAS-02-106-17

DOI: https://dx.doi.org/10.15863/TAS.2022.02.106.17

Language: English

Citation: Karshiev, D. A., Muradov, F. A., & Shirinov, V. N. (2022). Numerical solution of the problem of harmful emissions spread in the atmosphere by the method of splitting into physical processes. ISJ Theoretical & Applied Science, 02 (106), 149-162. Soi: http://s-o-i.org/1.1/TAS-02-106-17 Doi: https://dx.doi.org/10.15863/TAS.2022.02.106.17

Pages: 149-162

Published: 28.02.2022

Abstract: The aim of this paper is to simulate the process of harmful impurities spread in the surface layer of the atmosphere. A model of industrial emissions spread in the atmosphere was developed taking into account the rate of deposition of fine particles, described using a multidimensional partial differential equation with appropriate initial and boundary conditions. The basic laws of hydrothermodynamics were used in deriving the model. To numerically solve the problem, the method of splitting into physical processes (transfer, diffusion, and absorption of harmful particles) was used, as well as an implicit finite-difference scheme in time of the second order of accuracy. Analysis of the results of computational experiments shows that the developed computational algorithm provides sufficient accuracy of the solution compared with field measurement data and has a certain advantage over other numerical methods. In the course of computational experiments, the degree of influence of such parameters as wind velocity (speed) and direction on the process of aerosol particles spread in the atmosphere was established; as well as absorption coefficient and physicomechanical properties of particles.

Key words: mathematical model, numerical algorithm, approximation, transfer and diffusion, atmosphere, harmful aerosols, rate of particles deposition.