Numerical Simulation of Moving Particle Semi-Implicit Method for Single-Film Bubbles Coalescence and Connection

被引：1
|
作者：
Ni N. [1 ]
Sun Z. [1 ]
Chen X. [1 ]
Xi G. [1 ]
机构：
[1] School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an
来源：
Sun, Zhongguo | 1600年 / Xi'an Jiaotong University卷 / 51期
关键词：
Bubble coalescence; Bubble connection; Moving particles semi-implicit method; Sing-film bubble; Surface tension;
D O I：
10.7652/xjtuxb201712023
中图分类号：
学科分类号：
摘要：
The mesh-less moving particle semi-implicit method is employed within the Lagrangian framework to investigate the special geometry of the single film bubble with gas being shrouded by a layer of liquid film, and its special dynamic characteristic that surface tension acts both on the inside and outside interfaces. A surface tension model of the single-film-double-interfaces is established based on the surface tension model of surface free energies, and the complex interface movement in the oscillation process of the single-film bubble is calculated and captured. Moreover, the coalescence and connection process of two single-film bubbles are simulated and analyzed, and the typical flow phenomena and deformation characteristics of the liquid film are obtained. Results show that the leading role of the surface tension in the bubble deforming process reduces when either the surface tension coefficient decreases or the fluid viscosity increases. Furthermore, a concave tangent method is proposed to calculate the angle of the liquid film of the connected bubbles, which helps to describe the shape of connected bubble, quantitatively. These results provide some theoretical supports to the industrial froth breaking. © 2017, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：156 / 162
页数：6
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