CIESC Journal ›› 2025, Vol. 76 ›› Issue (4): 1504-1512.DOI: 10.11949/0438-1157.20241096

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

A coupling model of the approaching-thinning process with the effect of bubble surface deformation

Runjian LIU1(), Gang LIN1, Ling ZHANG1, Dong XU1, Ming LI2(), Luchang HAN1()   

  1. 1.School of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
    2.School of Resource and Environment, Hunan University of Technology and Business, Changsha 410205, Hunan, China
  • Received:2024-09-30 Revised:2024-11-04 Online:2025-05-12 Published:2025-04-25
  • Contact: Ming LI, Luchang HAN

考虑气泡表面变形影响的靠近-减薄过程耦合模型

刘润健1(), 林刚1, 张玲1, 徐栋1, 李明2(), 韩路长1()   

  1. 1.湘潭大学化工学院,湖南 湘潭 411105
    2.湖南工商大学资源环境学院,湖南 长沙 410205
  • 通讯作者: 李明,韩路长
  • 作者简介:刘润健(2000—),男,硕士研究生,202221581968@smail.xtu.edu.cn
  • 基金资助:
    国家自然科学基金项目(22378340)

Abstract:

The bubble collision phenomenon plays a crucial role in multiphase dispersion process, affecting the bubble size distribution and flow field structure. The bubble collision process includes two sub-processes of bubble approaching each other and liquid film drainage thinning. However, the existing models have limitations in predicting bubble collision, especially the rebound phenomenon, mainly due to the neglect of surface deformation outside the liquid film region. The surface deformation caused by collision may cause part of the system kinetic energy to be converted into surface energy, which accelerates the consumption of system kinetic energy to a certain extent. By introducing the restoring force caused by surface deformation into the force equilibrium equation for bubble approaching process, an improved model coupling the approaching-thinning process is developed. The results show that in comparison with the traditional model, the improved model has higher accuracy in predicting bubble collision. As the bubble collision speed increases, the restoring force on the bubble surface due to surface deformation is greater, the deformation may be more obvious.

Key words: bubble, collision, surface deformation, coalescence, rebound, simulation

摘要:

气泡碰撞现象在多相分散过程中通常起着关键作用,影响着气泡尺寸分布和流场结构。气泡碰撞过程包括气泡相互靠近和液膜排液减薄两个子过程。然而,现有模型在预测气泡碰撞,特别是反弹现象时存在不足,主要源于对液膜区域以外表面变形的忽略。而碰撞引起的表面变形可能会促使一部分系统动能转化为表面能,在一定程度上加快系统动能的消耗。通过将表面变形导致的表面恢复性作用力引入气泡相互靠近的力平衡方程中,发展了一个耦合靠近-减薄过程的改进模型。结果表明,相较于传统模型,改进模型能更合理地预测气泡碰撞的结果。

关键词: 气泡, 碰撞, 表面变形, 聚并, 反弹, 模拟

CLC Number: