Acoustic Rotational Manipulation Using Orbital Angular Momentum Transfer
Idioma
en
Article de revue
Este ítem está publicado en
Physical Review Letters. 2012, vol. 109, n° 3, p. 034301
American Physical Society
Resumen en inglés
We report on the first quantitative test of acoustic orbital angular momentum transfer to a sound absorbing object immersed in a viscous liquid. This is done by realizing an original experiment that is to spin a millimeter-size ...Leer más >
We report on the first quantitative test of acoustic orbital angular momentum transfer to a sound absorbing object immersed in a viscous liquid. This is done by realizing an original experiment that is to spin a millimeter-size target disk using an ultrasonic vortex beam. We demonstrate the balance between the acoustic radiation torque calculated from the Brillouin stress tensor and the viscous torque evaluated from the steady state spinning frequency. Moreover, we unveil a rotational acoustic streaming phenomenon that results from the acoustic angular momentum transfer to the host fluid. We show that it lowers the viscous torque, thereby restoring the torque balance.< Leer menos
Palabras clave en inglés
Nonlinear acoustics
Low-Reynolds-number (creeping) flows
Orígen
Importado de HalCentros de investigación