Amirkabir Journal of Mechanical Engineering

Amirkabir Journal of Mechanical Engineering

Investigation of dust dispersion in urban environment using large eddy simulation method

Document Type : Research Article

Authors
mohammad reza shah nazari 1
Hamid Chenarani 2
Aryan Ahmadpour 3
1 associate prof./ Mechanical faculty/K.N.Toosi university of technology
2 Faculty of Mechanical Engineering, K. N. Toosi university of technology, Tehran, Iran
3 Faculty of Mechanical Engineering, K. N. Toosi University of technology, Tehran, Iran
10.22060/mej.2024.22247.7588
Abstract
Pollution and the distribution of dust in urban areas have caused a wide range of diseases. Dust is one of the environmental phenomena that has caused adverse effects on health and the environment. Contamination caused by dust of different origins is spread across a wide range of atmospheres. Our understanding of the mechanism of dust distribution and the turbulence in urban areas is very important, which helps us reduce the effects of these types of contaminants. Computational Fluid Dynamics models have been considered in this study due to the economical approach to research in the field of dust distribution. Due to the turbulence of the wind flow inside the city, we use the large eddy simulation method to model this turbulence, which is widely used in computational wind engineering. In this study, we have investigated the dust in the urban area. For this purpose, the effect of the wind direction angle and the urban environment as well as the height of the buildings on the speed distribution and dispersion of fine dust with time has been investigated in two separate computing spaces. By comparing the results between 0° and 10° angle, it has been observed that with the increase of the flow turbulence intensity angle, these turbulent characteristics lead to the dispersion and persistence of fine dust in the urban environment. By comparing the results, we conclude that by creating an angle in the urban area due to increased mixing, the amount of dust distribution in the urban area rises.
Keywords
Dust
Urban area
Turbulence
Large eddy simulation
Subjects
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Amirkabir Journal of Mechanical Engineering
Volume 55, Issue 11
February 2024
Pages 1299-1318