Fractal Characterization of the Structure of Aerosol Agglomerates Grown at Reduced Pressure

Reist, Parker C.; Hsieh, Ming-ta; Lawless, P.A.

doi:10.1080/02786828908959303

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…Although there are techniques for demonstrating the fractal nature of an aerosol sample, the techniques have not been pursued for this work. The present grounds for assuming a fractal structure are qualitative: 1) scanning electron microscope photographs of the particles (see Figure 1) appear similar in nature to those reported in the fractal literature (e.g., Reist et al, 1989), and 2) the coagulation-dominated pathway creating these particles typically results in fractal morphologies (e.g., Witten and Sander, 1981). A careful study of the suitability of a fractal model for these combustion particles is one that should be pursued in the future.…”

Section: Comparison With Dmps and Cnc Testssupporting

confidence: 70%

Aerosol formation from high-velocity uranium drops: Comparison of number and mass distributions. Final report

Rader¹,

Benson²

1995

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Section: Comparison With Dmps and Cnc Testssupporting

confidence: 70%

Aerosol formation from high-velocity uranium drops: Comparison of number and mass distributions. Final report

Rader¹,

Benson²

1995

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“…The keyword "aerosol" appears less frequently in the analysed literature. Atmospheric aerosol, being referred to as a suspension of solid or liquid particles in air [69], is considered conceptually equivalent to PM. The keyword "dust", which is defined as solid particles formed by the process of mechanical disruption (Reist, 1993), is also frequently mentioned in the analysed literature.…”

Section: Keyword Mappingmentioning

confidence: 99%

State of the Art and Future Perspectives of Atmospheric Chemical Sensing Using Unmanned Aerial Vehicles: A Bibliometric Analysis

Marin,

Becciolini,

Santana

et al. 2023

Sensors

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In recent years, unmanned aerial vehicles (UAVs) have been increasingly used to monitor and assess air quality. The interest in the application of UAVs in monitoring air pollutants and greenhouse gases is evidenced by the recent emergence of sensors with the most diverse specifications designed for UAVs or even UAVs designed with integrated sensors. The objective of this study was to conduct a comprehensive review based on bibliometrics to identify dynamics and possible trends in scientific production on UAV-based sensors to monitor air quality. A bibliometric analysis was carried out in the VOSViewer software (version 1.6.17) from the Scopus and Web of Science reference databases in the period between 2012 and 2022. The main countries, journals, scientific organizations, researchers and co-citation networks with greater relevance for the study area were highlighted. The literature, in general, has grown rapidly and has attracted enormous attention in the last 5 years, as indicated by the increase in articles after 2017. It was possible to notice the rapid development of sensors, resulting in smaller and lighter devices, with greater sensitivity and capacity for remote work. Overall, this analysis summarizes the evolution of UAV-based sensors and their applications, providing valuable information to researchers and developers of UAV-based sensors to monitor air pollutants.

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“…f p is the Coulomb force exerted on a particle per unit mass of a particle, m p is the mass of a particle, and q p = n p e is the electrical charge acquired by the particle, where e is an elementary charge. The charge number of a particle n p is estimated using diffusion and field charging theories [33]:…”

Section: Governing Equationsmentioning

confidence: 99%

Numerical investigation of the separation mechanism in an electrostatic aerosol-to-hydrosol separator by glow corona discharge: a quantitative comparison of the effects of ionic wind and Coulomb force

Kim

Hwang

2020

Plasma Sources Sci. Technol.

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Electrostatic separation of particles from air onto a liquid surface has attracted increasing attention for various applications such as wet electrostatic precipitators and bioaerosol samplers. In this study, the electrostatic separation of particles onto the liquid surface is numerically modeled in a simplified manner. The simulated separation efficiency is validated by experimental values reported in literature. The effects of ionic wind and Coulombic force on particle separation for various electrical mobilities, applied voltages, and air flow rates are studied by decomposing the total separation efficiency into two components: Coulombic and ionic-wind separation efficiencies. Both Coulombic and ionic-wind separation efficiencies show the same behaviors as the total separation efficiency with changes in the operating conditions: they increase with increasing applied voltage and particle electrical mobility, and with decreasing air flow rate. Overall, the ionic-wind separation efficiency is higher than the Coulombic separation efficiency, mainly because of the short residence time. However, when the applied voltage and particle electrical mobility are high, and the air flow rate is low, the Coulombic force outperforms the ionic wind. Time-scale analysis well explains the relations between the relative importance of each separation mechanism and the operating parameters.

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Fractal Characterization of the Structure of Aerosol Agglomerates Grown at Reduced Pressure

Cited by 13 publications

References 25 publications

Aerosol formation from high-velocity uranium drops: Comparison of number and mass distributions. Final report

Aerosol formation from high-velocity uranium drops: Comparison of number and mass distributions. Final report

State of the Art and Future Perspectives of Atmospheric Chemical Sensing Using Unmanned Aerial Vehicles: A Bibliometric Analysis

Numerical investigation of the separation mechanism in an electrostatic aerosol-to-hydrosol separator by glow corona discharge: a quantitative comparison of the effects of ionic wind and Coulomb force

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