title: Oscillation mode conversion and energy confinement of acoustically agitated bubbles.
abstract: The acoustically agitated bubble oscillation in liquids that is considered to be related to the half-subharmonic acoustic bubble oscillations is discussed in terms of parametric decay instability. At the frequency of about 40 kHz, the half-subharmonic bubble oscillation mode should be a surface bubble oscillation that does not easily emit acoustic waves into water and confines acoustic energy from longitudinal waves. The half-subharmonic bubble oscillation is the dominant mode that leads to parametric decay instability of bubble oscillations.
authors: Honda Electronics Co., Ltd., 20 Oyamazuka, Oiwa-cho, Toyohashi, Aichi 441-3193, Japan. msato@honda-el.co.jp
authors: Masanori
authors: M
authors: Sato
authors: Nobunaga
authors: N
authors: Shibuya
authors: Nagaya
authors: N
authors: Okada
authors: Tonshaku
authors: T
authors: Tou
authors: Toshitaka
authors: T
authors: Fujii