Numerical Model of Ultrasonic Agglomeration of Submicron Particles in Resonant Gas Gaps

Khmelyov, V. N.; Golykh, Roman N.; Нестеров, В. А.; Shalunov, Andrey V.

doi:10.1007/s10891-023-02682-4

Cited by 5 publications

(7 citation statements)

References 16 publications

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“…The following describes the results of numerical calculations of ultrasonic coagulation based on concentration evolution models [12,13] taking into account the modified collision probability.…”

Section: Mathematical Formulation Of the Three-dimensional Problem Of...mentioning

confidence: 99%

“…In earlier publications made by the authors of this article [12,13], an approach to increasing the efficiency of ultrasonic coagulation was proposed, based on the use of stationary vortex acoustic flows associated with:…”

Section: Introductionmentioning

confidence: 99%

“…• absorption of vibrations in a gas, in which part of the absorbed energy is transferred into the movement of the gas with work performed against the forces of viscous friction; • the limitation of the voiced volume, which excludes the potentiality of this flow arising due to the volumetric source of energy. Stationary vortex flows lead to a local increase in the concentration of particles due to their inertial transfer to the periphery of the vortex by analogy with the physical effect of compaction of an aerosol cloud during the forced formation of swirling gas flows by feeding a gas suspension into a specially shaped chamber ("cyclone") [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…To describe this effect, the authors previously created a theoretical model with the development of numerical calculation methods, which makes it possible to predict the efficiency of coagulation in these flows [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Theoretical study of the influence of gas phase turbulent disturbances on the kinetics of ultrasonic coagulation of PM2.5

Khmelev,

Nesterov,

Bochenkov

2024

J. Phys.: Conf. Ser.

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A numerical model of ultrasonic coagulation of PM2.5 aerosol particles in three-dimensional vortex and turbulent acoustic flows is proposed in the article. The model is intended to identify the possibility of increasing the efficiency of the process. A numerical analysis of the model using the example of PM2.5 aerosol made it possible to establish that the presence of three-dimensional turbulent disturbances leads to the fact that the coagulation efficiency of PM2.5 reaches almost 100% at a sound pressure level of no more than 165 dB.

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Section: Mathematical Formulation Of the Three-dimensional Problem Of...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical study of the influence of gas phase turbulent disturbances on the kinetics of ultrasonic coagulation of PM2.5

Khmelev,

Nesterov,

Bochenkov

2024

J. Phys.: Conf. Ser.

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“…The most promising solution to this problem today may be the implementation of various physical mechanisms that can ensure the combination of such particles into larger agglomerates, which can be subsequently removed by existing gas cleaning methods. Therefore, special attention is being paid to the development of one of the most effective physical principles for the preliminary coalescence of particles into agglomerates: ultrasonic coagulation [5][6][7][8][9][10][11][12][13][14]. However, known approaches to ultrasonic coagulation by sinusoidal action turn out to be ineffective for PM2.5 due to the peculiarities of the physical mechanisms of hydrodynamic [9,10] and orthokinetic [11] interaction realized in gaseous media.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Simulation of the Influence of Acoustic on the Efficiency of PM 2.5 Coagulation

Khmelev,

Shalunov,

Golykh

2024

Mathematics

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The particles of micron and submicron sizes (PM 2.5 and less) in gas environments pose a significant danger to humanity due to the emergence of specific and very dangerous diseases of the cardiovascular, respiratory, and immune systems of the human body. Such particles are the most difficult to detect; therefore, their effects on human health have only been discovered in recent decades. Classical ultrasonic coagulation by sinusoidal action turns out to be ineffective for PM 2.5 due to the peculiarities of the physical mechanisms of hydrodynamic and orthokinetic interaction realized in gaseous media. This article presents a theoretical justification for choosing ways to increase the efficiency of ultrasonic coagulation of PM 2.5 by creating special conditions under which nonlinear disturbances of the velocity and pressure of the gas phase in the ultrasonic field occur. The authors performed simulations of ultrasonic coagulation under nonlinear disturbances of the velocity (vortex) and the pressure (shock waves), which has numerical difficulties due to the instability of existing methods. As a result of the numerical analysis, the possibility of increasing the coagulation rate of particles in the submicron size range up to limit values (13 times due to nonlinear pressure disturbances, and an additional increase of at least 2 times due to aerosol compaction in the vortex field of gas velocity) was shown.

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Do rodents smell with sound?

Mercado,

Zhuo

2024

Neuroscience & Biobehavioral Reviews

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Numerical Model of Ultrasonic Agglomeration of Submicron Particles in Resonant Gas Gaps

Cited by 5 publications

References 16 publications

Theoretical study of the influence of gas phase turbulent disturbances on the kinetics of ultrasonic coagulation of PM2.5

Theoretical study of the influence of gas phase turbulent disturbances on the kinetics of ultrasonic coagulation of PM2.5

Mathematical Simulation of the Influence of Acoustic on the Efficiency of PM 2.5 Coagulation

Do rodents smell with sound?

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