Application of ultrasound to settle submicron aerosols

Antonnikova, A. A.; Kudryashova, O. B.; Shalunova, Ksenia V.

doi:10.1109/edm.2012.6310194

Cited by 3 publications

(4 citation statements)

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“…The expression for the probability of particle collisions includes acoustic radiation parameters (frequency and intensity) (Antonnikova et al, 2012). The calculations made according to the model proposed describe well the experimental data for aerosols with characteristic particle sizes of 10 microns and larger .…”

Section: Introductionmentioning

confidence: 72%

Mechanisms of Aerosol Sedimentation by Acoustic Field

Kudryashova¹,

Antonnikova²,

Korovina³

et al. 2015

Archives of Acoustics

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Acoustic radiation sources are successfully applied to cleaning rooms from dust of fairly large particle sizes (ten micrometers and larger). The sedimentation of fine aerosols (particle diameter of 1-10 microns) is a more complicated challenge. The paper is devoted to the substantiation of the acoustic sedimentation method for such aerosols. On the basis of the mathematical model analysis for aerosol sedimentation by the acoustic field the mechanisms of this process have been determined and include the particle coagulation acceleration and radiation pressure effect. The experimental results of the acoustic sedimentation of a model aerosol (NaCl) are shown. The calculation results according to the mathematical model for coagulation and sedimentation, on the basis of the Smolukhovsky's equation taking into account various mechanisms of aerosol sedimentation by sound depending on the particle sizes and sound intensity, are given. The necessity to use intensive sources of high-frequency sound has been confirmed, suggesting that these sources must be located above dust clouds.

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Section: Introductionmentioning

confidence: 72%

Mechanisms of Aerosol Sedimentation by Acoustic Field

Kudryashova¹,

Antonnikova²,

Korovina³

et al. 2015

Archives of Acoustics

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“…Let's consider transformation of distribution by the sizes of particles of a cloud with the time t. Following [5,6], write the balance equation (the Smolukhovsky's equation, integral case), describing change over time a vector of mass function of distribution of particles by the sizes:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Expression (2) has to include the parameters characterizing ultrasonic influence, first of all, amplitude and frequency of radiation. It is received [5] that the number of meetings of particles in a sound field is proportional to diameter of particles, a square of speed of their movement U 0 (which, in turn, is defined by amplitude of sound waves), to concentration of particles n 0 , streamline flow coefficient k flw and in inverse proportion to viscosity of the environment ν:…”

Section: Probability Of Collisions Of Particles At Ultrasonic Influencementioning

confidence: 99%

“…Acoustic waves, generally sound frequencies [3] are successfully used in sets of purification of gases and sedimentation of smokes. It is shown [4][5][6] that at sedimentation of the fine smokes (most difficult in this sense) it is necessary to use higher, ultrasonic frequencies. In this work, mechanisms of influence of ultrasonic waves on sedimentation of aerosols with a characteristic size of particles, a micrometer order are investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

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Sedimentation of Superfine Aerosol by Means of Ultrasound

Antonnikova¹,

Korovina²,

Kudryashova³

2013

OJA

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The article is devoted to a problem of sedimentation of superfine aerosols with a characteristic size of particles, an order of values of micrometers. Acceleration of the sedimentation process is promoted by imposing of an acoustic field that leads to acceleration of coagulation of particles. Besides, pressure of the sound radiation directed down, accelerates gravitational sedimentation of an aerosol. The mathematical model is based on the Smolukhovsky's equation, describeing dynamics of change of distribution function by the sizes of aerosols particles taking into account ultrasonic influence, evaporation (for liquid aerosols) and sedimentation. Influence of introduction of an additional phase on coagulation and sedimentation speed is investigated. Results of a theoretical and experimental study of dispersion parameters and the sedimentation speed of superfine aerosols are presented.

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