| 王寻,黎奥,周敏,梁金福,张泽坤,吴伟.方波驱动下双气泡的动力学行为*[J].,2022,41(5):735-742 |
| 方波驱动下双气泡的动力学行为* |
| Dynamics of double-bubble system driven by square waves |
| 投稿时间：2021-08-07 修订日期：2022-09-01 |
| 中文摘要: |
| 探索方波驱动下双气泡的脉动规律，能够促进方波在声空化工程中的实际应用。本文通过数值求解双气泡耦合方程组，研究了方波驱动下双气泡的动力学行为，得到了多种条件下不同时刻两个气泡半径的数值，并以此计算出气泡间的次Bjerknes力。研究表明，增大驱动频率会使得两个气泡膨胀时能达到的最大半径和次Bjerknes力减小。当两个气泡的平衡半径不同时，其中一个气泡的剧烈收缩会使得另一个气泡产生一个振动方向相反的声脉冲。随着两个气泡平衡半径差距的增加，气泡收缩的时间间隔增大。此外，当驱动声压幅值逐渐增大时,气泡脉动规律也会发生很大的变化。 |
| 英文摘要: |
| Exploring the dynamics of double-bubble system driven by square wave is helpful for the application of square wave in acoustic cavitation engineering. This paper numerically simulated the coupled equations of double bubbles, theoretically studied the pulsation rules of double bubbles driven by the square wave. Radii of bubbles under different conditions have been acquired, and the secondary Bjerknes force between bubbles has been calculated. Research show that under square-wave driving, the maximum temperature and pressure generated when the bubbles collapse are obviously higher than that under sine-wave driving, and increasing the frequency leads to the decreasing of the maximum value of bubble radii and secondary Bjerknes force. If the two bubbles have different equilibrium radii, the collapsing of one bubble will make the other one generate a negative pulse. If the difference between the equilibrium radii of two bubbles becomes large, the interval between the collapsing moments of two bubbles increases. Besides, the amplitude of driving acoustic wave has obvious effect on the dynamics of bubbles. |
| DOI：10.11684/j.issn.1000-310X.2022.05.007 |
| 中文关键词: 气泡动力学，超声驱动，方波，声辐射 |
| 英文关键词: Bubble dynamics,Ultrasound driving,Square wave,Radiation pressure |
| 基金项目:国家自然科学基金项目(11564006, 11864007), 陕西省自然科学基础研究计划项目(2021JQ-655), 上海市大学生创新创业训练计划项目(S202111458096), 上海电机学院引进人才科研启动项目(B1-0288-21-007-01-030) |
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