Generally, the acoustic streaming is a steady mean flow, whose response time scale is much smaller than the one of the acoustic vibration.
12.
His fields of research include plasma, nonlinear acoustics, hydroacoustics and acoustic streaming . and has held positions in NAVF, NTVF, and in the national committee of the International Union of Theoretical and Applied Mechanics.
13.
The detailed motion of the powder is actually due to an effect called " acoustic streaming " caused by the interaction of the sound wave with the boundary layer of air at the surface of the tube.
14.
His lifetime of physics research spans other aspects of acoustics as well, include the contributions to the understanding of acoustic radiation pressure, which has applications to Acoustic levitation and other devices which exploit macrosonic phenomena and acoustic streaming, as well as to several other fields of Physics ( with example references shown here ), including General Relativity, ( primarily in the area of gravitational waves ), including Gravitational phenomena analogous to the parametric array, Cosmology, low temperature physics the Physics of Sound in Liquid Helium, and High Energy Particle Physics ( primarily in the area of cosmic ray particle detectors.
