Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Dynamics of two bubbles colliding at high Reynolds numbers in water: Bubble rebound behavior study
AIChE Journal ( IF 3.5 ) Pub Date : 2024-12-03 , DOI: 10.1002/aic.18682 Runci Song, Kefeng Fang, Bing Xiang, Luchang Han, Xin Feng, Jie Chen, Chao Yang
AIChE Journal ( IF 3.5 ) Pub Date : 2024-12-03 , DOI: 10.1002/aic.18682 Runci Song, Kefeng Fang, Bing Xiang, Luchang Han, Xin Feng, Jie Chen, Chao Yang
The collision between bubbles is essential to gas–liquid dispersion systems. When bubbles encounter each other, they may either rebound or coalesce. Yet, little is known about the rebound dynamics immediately after two bubbles collide. This work investigates such collision dynamics of two bubbles at high Reynolds numbers in water through experiment and simulation. The moving velocity, deformation, contact time during collision and restitution coefficient of bubbles are analyzed. Simulations reproduced quantitatively the bubble rebound behavior, revealing the evolution of various energies involved in collision. Simulation results show that over 70% of the system's initial mechanical energy (SME) could be converted into bubble surface energy (BSE) during the approach. In turn, the excess BSE is converted back into SME driving bubbles to rebound with significant dissipation. A mass‐spring‐damper model is developed, which describes the dynamic of bubble rebound well. This contribution enhances the understanding of bubble interactions in multiphase flow.
中文翻译:
水中两个气泡在高雷诺数处碰撞的动力学:气泡反弹行为研究
气泡之间的碰撞对于气-液分散系统至关重要。当气泡相互相遇时,它们可能会反弹或聚结。然而,人们对两个气泡碰撞后立即出现的反弹动态知之甚少。这项工作通过实验和模拟研究了水中两个高雷诺数气泡的碰撞动力学。分析了气泡的移动速度、变形、接触时间和恢复系数。仿真定量再现了气泡反弹行为,揭示了碰撞中涉及的各种能量的演变。仿真结果表明,在进近过程中,系统初始机械能 (SME) 的 70% 以上可以转化为气泡表面能 (BSE)。反过来,过剩的 BSE 又转化为 SME 驱动泡沫,以显着消散反弹。建立了一个质量-弹簧-阻尼器模型,该模型很好地描述了气泡回弹的动力学。这一贡献增强了对多相流中气泡相互作用的理解。
更新日期:2024-12-03
中文翻译:
水中两个气泡在高雷诺数处碰撞的动力学:气泡反弹行为研究
气泡之间的碰撞对于气-液分散系统至关重要。当气泡相互相遇时,它们可能会反弹或聚结。然而,人们对两个气泡碰撞后立即出现的反弹动态知之甚少。这项工作通过实验和模拟研究了水中两个高雷诺数气泡的碰撞动力学。分析了气泡的移动速度、变形、接触时间和恢复系数。仿真定量再现了气泡反弹行为,揭示了碰撞中涉及的各种能量的演变。仿真结果表明,在进近过程中,系统初始机械能 (SME) 的 70% 以上可以转化为气泡表面能 (BSE)。反过来,过剩的 BSE 又转化为 SME 驱动泡沫,以显着消散反弹。建立了一个质量-弹簧-阻尼器模型,该模型很好地描述了气泡回弹的动力学。这一贡献增强了对多相流中气泡相互作用的理解。