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arXiv · 1607.04011

Acoustically mediated long-range interaction among multiple spherical particles exposed to a plane standing wave

Shenwei Zhang·Chunyin Qiu·Mudi Wang·Manzhu Ke·Zhengyou Liu
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Abstract

In this work, we study the acoustically mediated interaction forces among multiple well-separated spherical particles trapped in the same node or antinode plane of a standing wave. An analytical expression of the acoustic interaction force is derived, which is accurate even for the particles beyond the Rayleigh limit. Interestingly, the multi-particle system can be decomposed into a series of independent two-particle systems described by pairwise interactions. Each pairwise interaction is a long-range interaction, as characterized by a soft oscillatory attenuation (at the power exponent of n=-1 or -2). The vector additivity of the acoustic interaction force, which is not well expected considering the nonlinear nature of the acoustic radiation force, is greatly useful for exploring a system consisting of a large number of particles. The capability of self-organizing a big particle cluster can be anticipated through such acoustically controllable long-range interaction.

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Shenwei Zhang, Chunyin Qiu, Mudi Wang, Manzhu Ke, Zhengyou Liu. 2016-07-14. Acoustically mediated long-range interaction among multiple spherical particles exposed to a plane standing wave. https://doi.org/10.1088/1367-2630%2F18%2F11%2F113034

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