The physicochemical processes of the formation of atmospheric aerosols

Lushnikov, A. A.; Zagainov, V. A.; Agranovski, Igor E.; Lyubovtseva, Yu. S.

doi:10.1134/s003602440810018x

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…The parameters A and p are independent of time at t > 10 s, which indicates that aggregation is completed prior to the instant at which these regions of aerosol arrive at the surface of the collector. Relations (6)- (8) are particular solutions to the equa tion of balance of the number of molecules, derived with allowance for discrete character of elementary acts of changes in size and represented, by analogy with the equa tion of connective diffusion, 8,13,14 in the form: (9) at…”

Section: Resultsmentioning

confidence: 99%

A kinetic model for formation of nanodisperse matter in the gas phase

et al. 2010

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Taking CsI aerosol as an example, it was shown that growth of primary aerosol particles can be described in terms of both discrete and continuum models. This conclusion is based on the results of experiments carried out using a method that makes it possible to distinguish primary particles against the background of their aggregates, to provide a complete transfer of the primary particles from aerosol bulk to a collector, and to determine the particle sizes by transmission electron microscopy. Under the conditions studied, the size distribution of the primary particles is described by a Fokker-Planck type equation.

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Section: Resultsmentioning

confidence: 99%

A kinetic model for formation of nanodisperse matter in the gas phase

et al. 2010

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“…В современной действительности все большую актуальность приобретает разработка эффективных способов воздействия на дисперсные системы (в том числе и наносистемы) с различными физикохимическими свойствами [1][2][3][4]. Это связано как с глобальной экологической про-блемой загрязнения атмосферы, когда аэрозоли с их огромной суммарной поверхностью оказывают существенное влияние на все физико-химические процессы в атмосфере, так и с развитием современного производства, на различных технологических стадиях которого используются Вестник Брянского государственного технического университета № 10(95) 2020 13 дисперсные вещества [5].…”

Section: Introductionunclassified

Transfer Processes in Dispersion Systems and Nano-Systems Containing Spherical and Cylindrical Particles

Uvarova¹,

Krivenko

Smirnova

et al. 2020

Bulletin of Bryansk State Technical University

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There is considered a transfer of electromagnetic emission in the systems of spherical dispersion particles with different optical characteristics. A numerical method for definition of thermal source density for two spherical particles is offered. The method is applicable both for particles with constant optical characteristics, and for particles the dielectric permittivity of which follows Kerr’s Law or depends upon even degrees of the module of an electric vector. A model of electromagnetic emission transfer in cylindrical particles having inclusions of other chemical composition is developed. The substance of the inclusion differs considerably from the material of the particle by a factor of emission absorption for the wave length under consideration in long-wavelength approximation. For the calculation of a temperature field of the spherical particle system in two-dimensional approximation there was used a finite element method. The configurations of the particle location of the system were chosen in a random way; as typical dimensions of the system there were considered longitudinal and transverse diameters of clusters, the distance between the centers of two largest particles and similar natural geometrical properties. A possibility for heat transfer control in such systems is considered. It follows from our model calculations obtained that both electromagnetic and thermal interaction of dispersion articles may be visible at larger distances between their centers; that close to the border of a dispersion particle there is a thermal surface layer of the particle, where temperature distribution bears considerably a heterogeneous character. It is defined that in a poly-dispersion system the impact of group effects can change temperature by one and a half times and more.

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“…Today, modeling the physical phenomena in disperse systems with various physicochemical properties is becoming increasingly important [1][2][3][4]. This is due to both the global environmental problem of atmospheric pollution when aerosols with their large total interface have a significant impact on all physicochemical processes in the global atmosphere, and modern technologies where dispersed substances are used [5].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Radiation and Heat Transfer in Disperse Systems Consisting of Spherical and Cylindrical Particles

et al. 2019

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The article deals with the electromagnetic radiation transfer in systems of spherical disperse particles with different optical characteristics. A model of the electromagnetic radiation transfer in cylindrical particles containing a small volume of different chemical substance is developed. The substance differs substantially from that of the particle in a radiation absorption coefficient for the wavelength under study in the long wave approximation. The finite element method is used to calculate the temperature field for the system of spherical particles in a two-dimensional approximation. The configurations of particle packing is chosen on a random basis, which significantly complicated the calculations, the longitudinal and transverse diameters of particle clusters, the distance between centers of two largest particles, and similar natural geometric properties have been considered as characteristic system dimensions.The possibility of controlling heat transfer in such systems is studied. It follows from our model calculations that both electromagnetic and thermal interaction of dispersed particles can be noticeable at large distances between their centers; that near the boundary of the dispersed particle there is a thermal surface layer of the particle, where the temperature distribution is essentially heterogeneous. It is concluded that the thermal mechanism of destruction of a weakly absorbing particle due to a strong increase in temperature because of electromagnetic resonance in a neighboring particle with a strong absorption. It is established that the effect of collective influences in polydisperse system can change temperature by more than 1,5 times.

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The physicochemical processes of the formation of atmospheric aerosols

Cited by 5 publications

References 4 publications

A kinetic model for formation of nanodisperse matter in the gas phase

A kinetic model for formation of nanodisperse matter in the gas phase

Transfer Processes in Dispersion Systems and Nano-Systems Containing Spherical and Cylindrical Particles

Electromagnetic Radiation and Heat Transfer in Disperse Systems Consisting of Spherical and Cylindrical Particles

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