A Study of the Sonoluminescence Phenomenon within a Spherical Oscillating Bubble

• Main Authors: Yu-Chen Lin, 林昱辰
• Other Authors: 黃美嬌
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/38313742913271583855

碩士 === 臺灣大學 === 機械工程學研究所 === 96 === Sonoluminescence is a light emission phenomenon from collapsing bubbles in liquid stimulated by an ultrasonic wave. In this study, the influences of the bubble ambient radius , the frequency of acoustic wave , and the amplitude of acoustic wave on the sonoluminescence are investigated numerically. The radius of a gas-filled bubble in a liquid is governed by the Rayleigh-Plesset equation. The behavior of the gas within the bubble is modeled by two different models - ”uniform adiabatic model” and “adiabatic van der Waals model”. The uniform adiabatic model is solved by a 2nd-order Runge-Kutta method and the adiabatic van der Waals model is solved by the Lax-Friedrich scheme. From the results of the uniform adiabatic model, we conclude that the smaller , and the smaller , and the larger , the easier the sonoluminescence is observed. However, because there is terrible numerical dissipation due to the discretization, the results of the adiabatic van der Waals model are nothing different from the uniform adiabatic model. To improve the accuracy of the adiabatic van der Waals model, a proper shock-capturing scheme must be implemented in the future. In 2002, Taleyarkhan et al.[27] reported the possibility of the “Bubble Fusion”. Maybe sonoluminescence can be another way to develop new energy.