AM06-16-005 体積振動する気泡の位相特性と相互作用力に関する補足的検討(波動・音・衝撃波(2),一般講演)

概要

論文の詳細を見る
The transition frequencies of acoustically interacting bubbles have been reexamined to confirm their existence and further clarify their physical property. We have recently suggested theoretically that a gas bubble interacting with a neighboring bubble in a sound field has up to three "transition frequencies" which invert the pulsation phase of the bubble [Ida, Phys. Lett. A 297, 210 (2002)]. The number is larger than that of resonance frequencies of the double-bubble system; namely, at least one of the three transition frequencies does not correspond to the resonance frequencies. We have furthermore suggested that the height relation between the newly derived characteristic frequency and the driving frequency determines the sign of the secondary Bjerknes force, an interpretation which is different from the frequently cited explanation after Bjerknes [Ida, Phys. Rev. E 67, 056617 (2003)]. In the present paper, we have attempted to clarify several similarities and differences among the natural, resonance, and transition frequencies. The present effort enforces our claim and thoroughly clarifies the roles of the transition frequencies in bubble-bubble interaction [Ida, Phys. Fluids 17, 097107 (2005)].
日本流体力学会の論文
2006-09-05