完全阻塞气泡在T型不等宽微通道分岔口的破裂动力学

doi:10.16085/j.issn.1000-6613.2015.11.010

化工进展 ›› 2015, Vol. 34 ›› Issue (11): 3886-3891.DOI: 10.16085/j.issn.1000-6613.2015.11.010

完全阻塞气泡在T型不等宽微通道分岔口的破裂动力学

温宇, 朱春英, 付涛涛, 马友光

天津大学化工学院, 化学工程联合国家重点实验室, 天津化学化工协同创新中心, 天津 300072

收稿日期:2015-03-27 修回日期:2015-04-22 出版日期:2015-11-05 发布日期:2015-11-05
通讯作者: 马友光,博士,研究员。E-mailygma@tju.edu.cn。
作者简介:温宇(1990—),男,硕士研究生。
基金资助:
国家自然科学基金(21276175,21106093)及天津市自然科学基金(13JCQNJC05500)项目。

Break-up dynamics of permanent obstructed bubble in T-junction with unequal width bifurcations

WEN Yu, ZHU Chunying, FU Taotao, MA Youguang

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China

Received:2015-03-27 Revised:2015-04-22 Online:2015-11-05 Published:2015-11-05

摘要/Abstract

摘要： 采用高速摄像仪对T型不等宽微通道分岔口的气泡完全阻塞破裂动力学行为进行了研究。实验以N₂作为分散相,含0.5%十二烷基硫酸钠(SDS)的蒸馏水与甘油混合液作为连续相。结果表明:气泡完全阻塞破裂过程可以分为两个阶段:挤压阶段和快速夹断阶段。挤压阶段又可分为快速挤压阶段和慢速挤压阶段,快速挤压阶段尚未发现普遍的变化规律,慢速挤压阶段量纲为1气泡颈部最小宽度与时间存在指数关系:(1-w_m/w₀)∝t^0.62。表观流速和液相黏度的增加可使颈部变细速率加快,而气泡初始长度对气泡颈部变化的影响可以忽略。在快速夹断阶段,量纲为1气泡颈部最小宽度与剩余时间存在指数关系:w_m/w₀∝(T-t)^0.32。

关键词: 微通道, 气液两相流, 气泡, 破裂, 界面

Abstract: A high speed camera was used to investigate the dynamics of permanent obstructed bubble break-up in a T-junction with unequal width bifurcations. N₂ and distilled water-glycerol solution with 0.5% surfactant sodium dodecyl sulfate (SDS) were used as dispersed and continuous phases, respectively. The process of permanent obstructed bubble break-up could be divided into two stages:squeezing stage and pinch-off stage. The squeezing stage could further be partitioned into fast squeezing stage and slow squeezing stages. During the fast squeezing stage, the change of minimum width of bubble neck could not be generalized. During the slow squeezing stage, the change of dimensionless minimum width of bubble neck with time could be described by a power-law relationship:(1-w_m/w₀)∝t^0.62. The thinning rate of bubble neck would be accelerated with the increase of superficial velocity and liquid viscosity, but was not affected by bubble length. During the pinch-off stage, the change of dimensionless minimum width of bubble neck with remaining time could be described by a power-law relationship:w_m/w₀∝(T-t)^0.32.

Key words: microchannel, gas-liquid two-phase flow, bubble, break-up, interface

中图分类号:

TQ021.4

温宇, 朱春英, 付涛涛, 马友光. 完全阻塞气泡在T型不等宽微通道分岔口的破裂动力学[J]. 化工进展, 2015, 34(11): 3886-3891.

WEN Yu, ZHU Chunying, FU Taotao, MA Youguang. Break-up dynamics of permanent obstructed bubble in T-junction with unequal width bifurcations[J]. Chemical Industry and Engineering Progree, 2015, 34(11): 3886-3891.

参考文献

[1] Baroud C N,Gallaire F,Dangla R. Dynamics of microfluidic droplets[J]. Lab Chip,2010,10(16):2032- 2045.

[2] Sieben V J,Floquet C F A,Ogilvie I R G,et al. Microfluidic colourimetric chemical analysis system:Application to nitrite detection[J]. Anal. Methods,2010,2(5):484- 491.

[3] Wu M H,Huang S B,Lee G B. Microfluidic cell culture systems for drug research[J]. Lab Chip,2010,10(8):939- 956.

[4] 褚良银,汪伟,巨晓洁,等. 微流控法构建微尺度相界面及制备新型功能材料研究进展[J]. 化工进展,2014,33(9):2229-2234

[5] Li L,Ismagilov R F. Protein crystallization using microfluidic technologies based on valves,droplets,and slipchip[J]. Annu. Rev. Biophys.,2010,39:139-158.

[6] Thorsen T,Roberts R W,Arnold F H,et al. Dynamic pattern formation in a vesicle-generating microfluidic device[J]. Phys. Rev. Lett.,2001,86(18):4163-4166.

[7] 党敏辉,任明月,陈光文. 微反应器内入口结构对Taylor气泡形成过程的影响[J]. 化工学报,2014,65(3):805-812.

[8] Engl W,Roche M,Colin A,et al. Droplet traffic at a simple junction at low capillary numbers[J]. Phys. Rev. Lett.,2005,95(20):208304.

[9] Wang X D,Zhu C Y,Fu T T,et al. Critical lengths for the transition of bubble breakup in microfluidic T-junctions[J]. Chem. Eng. Sci.,2014,111:244-254.

[10] Fu T T,Ma Y G,Funfschilling D,et al. Dynamics of bubble breakup in a microfluidic T-junction divergence[J]. Chem. Eng. Sci.,2011,66(18):4184-4195.

[11] Leshansky A M,Afkhami S,Jullien M C,et al. Obstructed breakup of slender drops in a microfluidic T junction[J]. Phys. Rev. Lett.,2012,108(26):264502.

[12] Hoang D A,Portela L M,Kleijn C R,et al. Dynamics of droplet breakup in a T-junction[J]. J. Fluid. Mech.,2013,717:R4.

[13] Wang X D,Zhu C Y,Fu,T T,et al. Bubble breakup with permanent obstruction in an asymmetric microfluidic T-junction[J]. AIChE J.,2015,61(3):1081-1091.

[14] van Steijn V,Kleijn C R,Kreutzer M T. Flows around confined bubbles and their importance in triggering pinch-off[J]. Phys. Rev. Lett.,2009,103(21):214501.

[15] Wu Y N,Fu T T,Zhu C Y,et al. Asymmetrical breakup of bubbles at a microfluidic T-junction divergence:Feedback effect of bubble collision[J]. Microfluid Nanofluid,2012,13(5):723- 733.

[16] de Menech M,Garstecki P,Jousse F,et al. Transition from squeezing to dripping in a microfluidic T-shaped junction[J]. J. Fluid. Mech.,2008,595:141-161.

[17] Jullien M C,Ching M J T M,Menetrier L,et al. Droplet breakup in microfluidic T-junctions at small capillary numbers[J]. Phys. Fluids,2009,21(7):072001.

[18] Lu Y T,Fu T T,Zhu C Y,et al. Pinch-off mechanism for Taylor bubble formation in a microfluidic flow-focusing device[J]. Microfluid Nanofluid,2014,16(6):1047-1055.

[19] van Hoeve W,Dollet B,Versluis M,et al. Microbubble formation and pinch-off scaling exponent in flow-focusing devices[J]. Phys. Fluids.,2011,23(9):092001.

完全阻塞气泡在T型不等宽微通道分岔口的破裂动力学

Break-up dynamics of permanent obstructed bubble in T-junction with unequal width bifurcations

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	王太, 苏硕, 李晟瑞, 马小龙, 刘春涛. 交流电场中贴壁气泡的动力学行为[J]. 化工进展, 2023, 42(S1): 133-141.
[2]	盛维武, 程永攀, 陈强, 李小婷, 魏嘉, 李琳鸽, 陈险峰. 微气泡和微液滴双强化脱硫反应器操作分析[J]. 化工进展, 2023, 42(S1): 142-147.
[3]	赵晨, 苗天泽, 张朝阳, 洪芳军, 汪大海. 负压状态窄缝通道乙二醇水溶液传热特性[J]. 化工进展, 2023, 42(S1): 148-157.
[4]	杨寒月, 孔令真, 陈家庆, 孙欢, 宋家恺, 王思诚, 孔标. 微气泡型下向流管式气液接触器脱碳性能[J]. 化工进展, 2023, 42(S1): 197-204.
[5]	陈匡胤, 李蕊兰, 童杨, 沈建华. 质子交换膜燃料电池气体扩散层结构与设计研究进展[J]. 化工进展, 2023, 42(S1): 246-259.
[6]	王家庆, 宋广伟, 李强, 郭帅成, DAI Qingli. 橡胶混凝土界面改性方法及性能提升路径[J]. 化工进展, 2023, 42(S1): 328-343.
[7]	卜治丞, 焦波, 林海花, 孙洪源. 脉动热管计算流体力学模型与研究进展[J]. 化工进展, 2023, 42(8): 4167-4181.
[8]	奚永兰, 王成成, 叶小梅, 刘洋, 贾昭炎, 曹春晖, 韩挺, 张应鹏, 田雨. 微纳米气泡在厌氧消化中的应用研究进展[J]. 化工进展, 2023, 42(8): 4414-4423.
[9]	俞俊楠, 俞建峰, 程洋, 齐一搏, 化春键, 蒋毅. 基于深度学习的变宽度浓度梯度芯片性能预测[J]. 化工进展, 2023, 42(7): 3383-3393.
[10]	陈蔚阳, 宋欣, 殷亚然, 张先明, 朱春英, 付涛涛, 马友光. 矩形微通道内液相黏度对气泡界面的作用机制[J]. 化工进展, 2023, 42(7): 3468-3477.
[11]	李吉焱, 景艳菊, 邢郭宇, 刘美辰, 龙永, 朱照琪. 耐盐型太阳能驱动界面光热材料及蒸发器的研究进展[J]. 化工进展, 2023, 42(7): 3611-3622.
[12]	李瑞东, 黄辉, 同国虎, 王跃社. 原油精馏塔中铵盐吸湿特性及其腐蚀行为[J]. 化工进展, 2023, 42(6): 2809-2818.
[13]	章凯, 金捍宇, 刘思宇, 王帅. 鼓泡流态化气泡间相互作用下相间传质过程的模拟[J]. 化工进展, 2023, 42(6): 2828-2835.
[14]	陶梦琦, 刘美红, 康宇驰. 基于micro-PIV的微通道内流体绕流单微圆柱和并联双微圆柱流场特性[J]. 化工进展, 2023, 42(6): 2836-2844.
[15]	刘厚励, 顾中浩, 阳康, 张莉. 3D打印槽道结构槽宽对池沸腾传热特性的影响[J]. 化工进展, 2023, 42(5): 2282-2288.