Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 14304-014304.doi: 10.1088/1674-1056/22/1/014304
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
王成会a b, 程建春a
Wang Cheng-Hui (王成会)a b, Cheng Jian-Chun (程建春)a
摘要: Using an appropriate approximation, we have formulated the interacting equation of multi-bubble motion for a system of a single bubble and a spherical bubble cluster. The behavior of the bubbles is observed in coupled and uncoupled states. The oscillation of bubbles inside the cluster is in coupled state. The numerical simulation demonstrates that the secondary Bjerknes force can be influenced by the number density, initial radius, distance, driving frequency, and amplitude of ultrasound. However, if a bubble approaches to a bubble cluster of the same initial radii, coupled oscillation would be induced and a repulsive force is evoked, which may be the reason why the bubble cluster can exist steadily. With increment of the number density of bubble cluster, the secondary Bjerknes force acting on the bubbles inside the cluster decreases due to the strong suppression of coupled bubbles. It is shown that there may be an optimal number density for a bubble cluster which can generate an optimal cavitation effect in liquid for a stable driving ultrasound.
中图分类号: (Ultrasonics, quantum acoustics, and physical effects of sound)