Abstract
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.
Go to article