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Title: Dynamic behavior of microscale particles controlled by standing bulk acoustic waves

We analyze the dynamic behavior of a spherical microparticle submerged in a fluid medium, driven to the node of a standing bulk acoustic wave created by two opposing transducers. We derive the dynamics of the fluid-particle system taking into account the acoustic radiation force and the time-dependent and time-independent drag force acting on the particle. Using this dynamic model, we characterize the transient and steady-state behavior of the fluid-particle system as a function of the particle and fluid properties and the transducer operating parameters. The results show that the settling time and percent overshoot of the particle trajectory are dependent on the ratio of the acoustic radiation force and time-independent damping force. In addition, we show that the particle oscillates around the node of the standing wave with an amplitude that depends on the ratio of the time-dependent drag forces and the particle inertia.
Authors:
;  [1] ;  [2]
  1. Department of Mechanical Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)
  2. Department of Mathematics, University of Utah, Salt Lake City, Utah 84112 (United States)
Publication Date:
OSTI Identifier:
22350875
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; FLUIDS; MOMENT OF INERTIA; QUASI PARTICLES; SIMULATION; SOUND WAVES; SPHERICAL CONFIGURATION; STANDING WAVES; STEADY-STATE CONDITIONS; TIME DEPENDENCE; TRAJECTORIES; TRANSDUCERS; TRANSIENTS