Dynamics of suspended particles in a two-dimensional high-frequency sonic field

Aerodynamic focusing in a channel with oscillating walls

“…We seek the solution of particle motion as a power series of . Then one has (Dain et al, 1995;Fernández de la Mora, 2006) …”

“…The possibility to use an oscillating flow as a particle focusing scheme was previously investigated for aerosol and hydrosol particle drifting motions in acoustic oscillating fields (see Dain, Fichman, Gutfinger, Pnueli, & Vainshtein, 1995;Vainshtein, Fichman, Shuster, & Gutfinger, 1996 and papers cited therein). In those works the drifting motions were studied in situations when undisturbed fluid is at rest.…”

Focusing in a quadrupole acoustic channel

“…To describe the cross-sectional systematic velocity we use the smallness of the frequency parameter, >1. Under this condition, the cross-sectional particle velocity can be expressed as a power series of (Dain et al, 1995;Vainshtein & Shapiro, 2008) …”

“…Many subsequent works study and utilize this phenomenon. This was established that particles can be concentrated under the action of Stokes drag force and acoustic radiation force depending on their size and sound frequency (see Czyz, 1990;Dain, Fichman, Gutfinger, Pnueli, & Vainshtein, 1995;Danilov & Mironov, 2000;Duhin, 1960;Nigmatulin, 1990;Vainshtein, Fichman, Shuster, & Gutfinger, 1996;Whitworth & Coakley, 1992). The acoustic radiation force was also used to position and levitate particles (see Anderson, Cluff, Lemmon, & Putnam, 2005;Coakley, Bardsley, Grundy, Zamani, & Clarke, 1989;Danilov & Mironov, 1984;Doinikov, 1997aDoinikov, , 1997bFuchs, 1964;Gopinath & Mills, 1994;Hertz, 1995;Hinds, Mallove, & First, 1977;Kaduchak, Sinha, & Lizon, 2002;King, 1934;Nyborg, 1984).…”

The two-dimensional acoustic standing wave and its application in coagulation of aerosols

“…al. [2] noticed that in the case of tw~dimensional standing wave, i.e. such of non-planar wavefront, the aerosol particles, besides the movement towards planes of maximum velocity amplitude of the medium (loops), perform also a kind of transversal drift, i.e.…”