Dynamics of two bubbles colliding at high Reynolds numbers in water: Bubble rebound behavior study

IF 4 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2024-12-02 DOI:10.1002/aic.18682

Runci Song, Kefeng Fang, Bing Xiang, Luchang Han, Xin Feng, Jie Chen, Chao Yang

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Abstract

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.

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水中高雷诺数两个气泡碰撞动力学：气泡回弹行为研究

气泡之间的碰撞是气液分散系统必不可少的。当气泡相遇时，它们可能反弹或合并。然而，人们对两个气泡碰撞后的反弹动力学知之甚少。本文通过实验和模拟研究了高雷诺数条件下两个气泡在水中的碰撞动力学。分析了气泡在碰撞过程中的运动速度、变形、接触时间和恢复系数。模拟定量再现了气泡的回弹行为，揭示了碰撞过程中各种能量的演化。仿真结果表明，在此过程中，超过70%的系统初始机械能（SME）可以转化为气泡表面能（BSE）。过剩的BSE反过来又转化为中小企业，带动泡沫反弹，耗散显著。建立了质量-弹簧-阻尼器模型，较好地描述了气泡回弹的动力学过程。这一贡献增强了对多相流中气泡相互作用的理解。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.