Mechanical Engineering Department, Chung-Ang University, Seoul 156-756, Republic of Korea.
Mechanical Engineering Department, Chung-Ang University, Seoul 156-756, Republic of Korea.
Ultrason Sonochem. 2014 Jul;21(4):1512-8. doi: 10.1016/j.ultsonch.2014.01.022. Epub 2014 Feb 2.
The velocity profile and radiation pressure field of a bubble cluster containing several thousand micro bubbles were obtained by solving the continuity and momentum equations for the bubbly mixture. In this study, the bubbles in the cluster are assumed to be generated and collapsed synchronously with an applied ultrasound. Numerical calculations describing the behavior of a micro bubble in a cluster included the effect of the radiation pressure field from the synchronizing motion of bubbles in the cluster. The radiation pressure generated from surrounding bubbles affects the bubble's behavior by increasing the effective mass of the bubble so that the bubble expands slowly to a smaller maximum size. The light pulse width and spectral radiance from a bubble in a cluster subjected to ultrasound were calculated by adding a radiation pressure term to the Keller-Miksis equation, and the values were compared to experimental values of the multibubble sonoluminescence condition. There was close agreement between the calculated and observed values.
通过求解包含数千个微泡的气泡簇的连续性和动量方程，获得了气泡簇的速度分布和辐射压力场。在本研究中，假设簇中的气泡与施加的超声波同步产生和坍塌。描述微泡在簇中行为的数值计算包括来自簇中气泡同步运动的辐射压力场的影响。来自周围气泡的辐射压力通过增加气泡的有效质量来影响气泡的行为，从而使气泡缓慢膨胀至较小的最大尺寸。通过在 Keller-Miksis 方程中添加辐射压力项来计算处于超声场中的气泡的光脉冲宽度和光谱辐射亮度，并将计算值与多泡声致发光条件的实验值进行比较。计算值与观察值非常吻合。
