Gas/particle Interaction in Ultrasound Agitated Gas Flow

Acoustic waves imply specific force and stress distributions onto particles in a gaseous environment. In this paper time-dependent and time-averaged acoustic forces of resonant standing ultrasound waves on rigid particles and agglomerates in gaseous environment are investigated by numerical simulation. The calculated resonant standing wave field is validated using experimental data. Acoustic forces are calculated for cylindrical and spherical particle geometries and the resulting values are compared with analytic correlations from literature. The position of the bodies in respect to the sound source was varied to study the local dependence of the acoustic force. Characteristics of gas/particle interaction in ultrasound agitated gas flow are discussed.