An analytical theory has been developed to calculate microstreaming velocity around a suspended sphere caused by oscillating bubbles in an unbounded viscous liquid.It has been demonstrated that the interaction of a bubble and a rigidity sphere can affect the magnitude and direction of acoustic streaming, especially for tangential components around the rigidity sphere.When the θ1(a component of spherical coordinates originates at the center of the rigidity sphere) varies in a period of π, The magnitude of tangential velocity around the suspended particle reaches the maximum at θ1=π/2.The velocity around the rigidity sphere is related to the relative position of medium.The increment of neighboring bubble radius makes acoustic streaming stronger, while the increment of distance between a bubble and a rigidity sphere induce the acoustic while the increment of distance between a bubble and a rigidity sphere induce the acoustic streaming weaker.%对无界黏性液体中刚性粒子和空化泡间的相互作用进行理论分析,得到了悬浮粒子周围的微流分布.数值结果表明:空化泡和刚性粒子间的相互作用可以影响声流速度的大小和方向,尤悬浮粒子周围声流速度的切线分量.当θ1(以悬浮粒子中心为原点建立的球坐标系中的分量)从0到π变化时,悬浮粒子微流切向速度大小在θ1=π/2时趋于0;悬浮粒子周围声流速度的大小和方向与其处在介质中的相对位置密切相关.空化泡半径增大时,悬浮粒子周围微流速度增大,但是当空化泡和悬浮粒子间距离增加时,悬浮粒子周围声流速度变小.
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