Kwak, HY Karng, SW Lee, YP 2024-01-21T05:12:15Z 2024-01-21T05:12:15Z 2021-09-01 2005-04 0374-4884 https://pubs.kist.re.kr/handle/201004/136623 An air bubble trapped in water emits light stably at its collapse point when a proper forcing amplitude and frequency of ultrasound are applied to the bubble. We used a rigorous analytical treatment to investigate the Bayleigh-Taylor (BT) instability mechanism that causes deviation from sphericity of the wall of the bubble at the collapse point in the sonolumidescence (SL) region. Our study revealed that the RT instability due to bubble wall acceleration occurred when the gas density inside bubble exceeded a certain limit. A lagging motion of bubble relative to the ultrasound due to the viscoelastic behavior of the bubble rather than viscous damping was a crucial parameter in determining the upper threshold of SL. The calculations for the upper limit of the stable sonoluminescence region agreed well with experimental data. English KOREAN PHYSICAL SOC VIOLENTLY COLLAPSING BUBBLES SHAPE OSCILLATIONS NEWTONIAN STARS MIE SCATTERING SINGLE DYNAMICS STABILITY ONSET PULSE Rayleigh-Taylor instability on a sonoluminescing gas bubble Article 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.46, no.4, pp.951 - 962 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 46 4 951 962 scie scopus kci ART000951779 000228458900037 2-s2.0-17744384527 Physics, Multidisciplinary Physics Article VIOLENTLY COLLAPSING BUBBLES SHAPE OSCILLATIONS NEWTONIAN STARS MIE SCATTERING SINGLE DYNAMICS STABILITY ONSET PULSE lagging motion Rayleigh-Taylor instability sonoluminescence ultrasound