Archives of Acoustics, 40, 4, pp. 485–489, 2015
10.1515/aoa-2015-0048

Mechanisms of Aerosol Sedimentation by Acoustic Field

Olga Borisovna KUDRYASHOVA
Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences
Russian Federation

Alexandra Alexandrovna ANTONNIKOVA
Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences
Russian Federation

Natalya Vladimirovna KOROVINA
Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences
Russian Federation

Igor Radikovich AKHMADEEV
Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences
Russian Federation

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.
Keywords: fine aerosol; size distribution; acoustic impact; coagulation; sedimentation; radiation pressure.
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DOI: 10.1515/aoa-2015-0048

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