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Journals
Atmosphere
Special Issues
Transport and Dispersion of Aerosols: Experimental and Numerical Studies
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Transport and Dispersion of Aerosols: Experimental and Numerical Studies

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Air Quality and Human Health".

Deadline for manuscript submissions: 19 July 2024 | Viewed by 2460

Special Issue Editors

Dr. Xiaole Chen

E-Mail Website
Guest Editor
School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210046, China
Interests: computational fluid dynamics (CFD); discrete element method (DEM); in vitro experiments for inhalation dosimetry; inhaler design innovation; occupational exposure risk assessment
Special Issues, Collections and Topics in MDPI journals
Dr. Yu Feng

E-Mail Website
Guest Editor
School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
Interests: computational fluid–particle dynamics (CFPD); discrete element method (DEM); physiologically based pharmacokinetics (PBPK); lung aerosol dynamics; pulmonary targeted drug delivery; AI-empowered smart inhaler design
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are delighted to announce a Special Issue of Atmosphere, entitled "Transport and Dispersion of Aerosols: Experimental and Numerical Studies", which aims to investigate the intricate mechanisms involved in the transport and dispersion of aerosols through a combination of experimental and numerical approaches. While the recent COVID-19 pandemic has emphasized the importance of aerosol transport and dispersion in the spread of viral aerosols, this issue seeks to explore the broader mechanistic aspects of aerosol transport beyond this specific context.

The objective of this Special Issue is to advance our understanding of the mechanisms governing aerosol transport and dispersion processes. We invite researchers to submit their original research articles, review papers, or short communications addressing various aspects of aerosol transport and dispersion, with a particular focus on the following topics:

  1. Delivery of aerosols in the human respiratory system: Investigating the transport and dispersion of aerosols within the respiratory system, considering factors such as particle size, deposition patterns, hydroscopicity during transport, and the potential implications for the spread of viral aerosols.
  2. Interactions between aerosols and indoor environments: Exploring the dynamic exchange and behavior of aerosols within indoor environments, including aspects such as filtration and ventilation and their impact on the transmission dynamics of viral aerosols. Authors are encouraged to investigate the influence of aerosol evaporation and hygroscopic growth in indoor environments.
  3. Interactions between aerosols in indoor and outdoor environments: Examining the complex interactions between aerosols present in both indoor and outdoor environments, considering factors such as airflows, pollutant sources, and the effects of outdoor weather conditions on the transport and dispersion of viral aerosols.

While we encourage submissions focusing on the above topics, we also welcome contributions that investigate other aspects of aerosol transport and dispersion through experimental and numerical studies.

Please also share this Call for Papers with your colleagues and peers who might be interested in contributing to this Special Issue. If you have any questions or require further information, please do not hesitate to contact us.

We look forward to receiving your contributions and endeavor to make this Special Issue a resounding success.

Dr. Xiaole Chen
Dr. Yu Feng
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atmosphere is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aerosols
  • transport
  • dispersion
  • deposition
  • airway
  • indoor
  • outdoor
  • evaporation
  • hygroscopic growth

Published Papers (3 papers)

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Research

16 pages, 6898 KiB  
Communication
Numerical Simulation of Urban Natural Gas Leakage Dispersion: Evaluating the Impact of Wind Conditions and Urban Configurations
by Tao Zhu, Xiao Chen, Shengping Wu, Jingjing Liu, Qi Liu and Zhao Rao
Atmosphere 2024, 15(4), 472; https://doi.org/10.3390/atmos15040472 - 11 Apr 2024
Viewed by 529
Abstract
This study investigates the dispersion of natural gas leakages in urban environments under varying wind conditions (Beaufort levels 1, 2, and 6) and street layouts, with a focus on the implications for mobile leak detection at a height of 0.3 m above ground. [...] Read more.
This study investigates the dispersion of natural gas leakages in urban environments under varying wind conditions (Beaufort levels 1, 2, and 6) and street layouts, with a focus on the implications for mobile leak detection at a height of 0.3 m above ground. Through numerical simulations, we analyze how urban canyons influence wind field and methane (CH4) concentration distributions, highlighting the impact of wind speed and urban geometry on gas dispersion. The key findings indicate that urban structures significantly affect gas dispersion patterns, with higher wind speeds facilitating better dispersion and reducing the risk of high-concentration gas buildups. The study underscores the need to consider both meteorological conditions and urban design in enhancing gas leak detection and safety measures in cities. The results contribute to improving emergency response strategies and urban planning for mitigating the risks associated with gas leaks. Full article
(This article belongs to the Special Issue Transport and Dispersion of Aerosols: Experimental and Numerical Studies)
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21 pages, 10424 KiB  
Article
CFD-DPM Simulation on the Atmospheric Pollutant Dispersion in Industrial Park
by Xiaofei Ma and Wenqi Zhong
Atmosphere 2024, 15(3), 298; https://doi.org/10.3390/atmos15030298 - 28 Feb 2024
Viewed by 690
Abstract
In order to mitigate the impact of particulate pollutants in Nanjing Sample Industrial Park, it is imperative to simulate the wind field and pollutant dispersion inside the park. Therefore, a CFD-DPM study was employed to simulate the wind field and pollutant dispersion with [...] Read more.
In order to mitigate the impact of particulate pollutants in Nanjing Sample Industrial Park, it is imperative to simulate the wind field and pollutant dispersion inside the park. Therefore, a CFD-DPM study was employed to simulate the wind field and pollutant dispersion with an accurate landform model. A large eddy simulation was utilized for calculating wind flow distribution inside the park, which is more suitable than Reynolds-Averaged Navier–Stokes Equations (RANS). The physical model of the plant canopy was incorporated to assess its influence on the wind field and particulate pollutants through drag, buoyancy, and deposition effects. Using this method, the distributions of the wind field, and contaminant and the sensitivity tests were obtained by means of calculating a number of research cases under different meteorological conditions. In the numerical results, the wind field was obstructed by the plant canopy, resulting in near-ground uniformity under unstable weather conditions. The distribution of particulate pollutants was influenced not only by the drag and buoyancy effects but also by deposition, which caused an accumulation of particulate pollutants on the windward side of the canopy under unstable weather conditions. The sensitivity tests were performed by comparing the concentrations of particulate pollutants under various conditional settings. The canopy regions can remove the particulate pollutant by 50% under stable weather conditions. The deposition effect is enhanced by larger particle density and diameter and is also influenced by leaf area density. Full article
(This article belongs to the Special Issue Transport and Dispersion of Aerosols: Experimental and Numerical Studies)
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12 pages, 3832 KiB  
Article
Investigation on Condensation Characteristics and Removal Performance of SO3 in Low-Low-Temperature Electrostatic Precipitator
by Zongkang Sun, Heng Chen and Linjun Yang
Atmosphere 2024, 15(2), 168; https://doi.org/10.3390/atmos15020168 - 27 Jan 2024
Viewed by 846
Abstract
The low-low-temperature electrostatic precipitator (LLT-ESP) is considered one of the mainstream technological approaches for achieving ultra-low ash emissions and has already been applied in many coal-fired power plants. Particulate matter and SO3 can both be removed by LLT-ESP. However, the removal performance [...] Read more.
The low-low-temperature electrostatic precipitator (LLT-ESP) is considered one of the mainstream technological approaches for achieving ultra-low ash emissions and has already been applied in many coal-fired power plants. Particulate matter and SO3 can both be removed by LLT-ESP. However, the removal performance of SO3 is relatively lower than that of particulate matter, which is caused by the condensation characteristics of SO3. In this paper, the condensation characteristics of SO3 were investigated on a simulated experimental system, and several measurement and characteristic methods were used to investigate mechanisms. After reducing the flue gas temperature with a heat exchanger, the size distribution of particulate matter, the mass concentration of SO3 on different sizes of particulate matter, as well as the microscopic morphology and elemental composition of particulate matter, were all experimentally studied. The results indicate that gaseous SO3 transformed into a liquid phase by heterogeneous or homogeneous condensation and then adhered to the surface of particulate matter through nucleation–condensation, collision–coalescence, and adsorption reactions. Furthermore, the removal efficiency of SO3 in LLT-ESP was also investigated under various conditions, such as ash concentration and flue gas temperature drop, suggesting that a higher ash concentration and a more significant temperature drop were beneficial for improving SO3 removal efficiency. Nevertheless, it is worth noting that the impact was limited by a further increase in ash concentration and a drop in flue gas temperature. Full article
(This article belongs to the Special Issue Transport and Dispersion of Aerosols: Experimental and Numerical Studies)
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