Coalescence characteristics of bubbles from submerged micron-sized double-orifice plates: Experiments and modeling

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2024-11-14 DOI:10.1016/j.ces.2024.120943

Hong Jiang, Ziyang Chen, Ziqin Xu, Wenyi Pei, Zhenchen Tang, Jiuxuan Zhang, Zhengyan Qu, Weihong Xing, Rizhi Chen

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Abstract

Bubble dynamics is of significance for improving the performance of bubbling. However, few studies focused on the detailed characteristics of bubble formation at micron-sized multiple orifices. Herein, the dynamic behaviors of bubble growth at micron-sized double-orifice plates are visually investigated. The evolution of adjacent bubbles, coalescence frequency, and detachment diameter of the initial bubbles with orifice diameter and spacing, gas flow, and liquid properties are obtained. Based on the experimental data, three dimensionless parameters, Weber number (We), Reynolds number (Re), and Froude number (Fr), are introduced through dimensional analysis. A mathematical correlation between the Sauter mean diameter of bubbles and orifice diameter and spacing, gas velocity, and liquid viscosity and surface tension is established for the first time. The error between the calculated and experimental values is found to be within ± 15 %. The work provides guidance for the understanding and development of bubbling at micro orifices.

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浸没在微米级双孔板中的气泡的凝聚特性：实验与建模

气泡动力学对提高气泡性能具有重要意义。然而，很少有研究关注微米级多孔板上气泡形成的详细特征。本文直观地研究了微米级双孔板上气泡生长的动态行为。得出了相邻气泡、凝聚频率和初始气泡脱离直径随孔径和间距、气体流量和液体性质的变化情况。根据实验数据，通过尺寸分析引入了三个无量纲参数：韦伯数 (We)、雷诺数 (Re) 和弗劳德数 (Fr)。首次建立了气泡的萨特平均直径与孔径和间距、气体速度、液体粘度和表面张力之间的数学相关性。发现计算值和实验值之间的误差在 ± 15 % 以内。这项工作为理解和开发微孔气泡提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.