剪切流场中双重乳液稳态形变

张程宾; 于程; 刘向东; 金瓯; 陈永平

doi:10.7498/aps.65.204704

摘要

建立了不可压缩双重乳液界面行为的理论模型，并可视化实验验证了所建立模型的正确性.基于所建立的理论模型，数值模拟研究了剪切流场中双重乳液的形变机理，探讨了内外液滴半径比及各相工质黏度对其形变特性的影响规律.研究结果表明：在剪切流场中，双重乳液的稳态形变程度随着毛细数的增大而加剧，且内液滴抗形变能力比外液滴更强；随着内外液滴半径比的增大，双重乳液内外液滴间相互作用增强，导致内液滴形变程度增大，同时内液滴抗形变效应逐渐凸显，造成外液滴形变程度减小；双重乳液自身黏性是液滴形变的一种阻力，随着内、外液滴黏度的升高，双重乳液整体形变程度均减小，并且乳液外液滴相黏度变化对双重乳液稳态形变程度的影响更为明显.

关键词:

Abstract

The manipulation of double emulsion droplet via shear flow field is widely encountered in microfluidic devices. However, the interface evolution and hydrodynamics behavior of double emulsion droplet in shear flow is less understood till now. In this paper, a theoretical model of double emulsion droplet in a Couette flow device is developed and numerically analyzed to characterize the interface behavior of incompressible double emulsion droplet, which is also verified by a visualization experiment. Based on this model, the mechanisms underlying the steady deformation of double emulsion droplet under shear are investigated, and the effects of radius ratio of inner droplet to the outer one and viscosities of working fluids on the steady deformation are discussed. The results indicate that the steady deformation of double emulsion droplet in the shear increases with the rise in capillary number, and the deformation resistance of inner droplet is larger than that of the outer droplet. With increasing the radius ratio of inner droplet to the outer one, the interaction between the inner and outer droplets becomes great and thus the deformation degree of the inner droplet is increased. In addition, the effect of big deformation resistance by the inner droplet tends to be obvious, leading to decreasing the deformation degree of outer droplet. The viscosities of both inner and outer droplets provide a resistance for the deformation of double emulsion droplet. With the rises in viscosities of inner and outer droplets, the deformation degree of integral double emulsion droplet decreases. In addition, the effect of outer droplet viscosity on the steady deformation is more obvious than that of the inner droplet.

Keywords:

作者及机构信息

1.
东南大学能源与环境学院, 南京 210096;

2.
扬州大学水利与能源动力工程学院, 扬州 225127

通信作者: 陈永平, ypchen@seu.edu.cn

基金项目: 国家自然科学基金（批准号：51306033）和江苏省自然科学基金（批准号：BK20130621，BK20140488）资助的课题.

Authors and contacts

1.
School of Energy and Environment, Southeast University, Nanjing 210096, China;

2.
School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China

Corresponding author: Chen Yong-Ping, ypchen@seu.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 51306033) and the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20130621, BK20140488).

参考文献

[1]	Lee D, Weitz D A 2008 Adv. Mater. 20 3498
[2]	Shum H C, Zhao Y J, Kim S H, Weitz D A 2011 Angew. Chem. Int. Ed. 123 1686
[3]	Zhao Y J, Zhao X W, Hu J, Xu M, Zhao W J, Sun L G, Zhu C, Xu H, Gu Z Z 2009 Adv. Mater. 21 569
[4]	Bychkov V, Modestov M, Law C K 2015 Prog. Energy Combust. Sci. 47 32
[5]	Moreau L, Levassort C, Blondel B, de Nonancourt C, Croix C, Thibonnet J, Balland-Longeau A 2009 Laser Part. Beams 27 537
[6]	Xu W, Lan Z, Peng B L, Wen R F, Ma X H 2015 Acta Phys. Sin. 64 216801 (in Chinese)[徐威, 兰忠, 彭本利, 温荣福, 马学虎2015 64 216801]
[7]	Huang H, Hong N, Liang H, Shi B C, Chai Z H 2016 Acta Phys. Sin. 65 084702 (in Chinese)[黄虎, 洪宁, 梁宏, 施保昌, 柴振华2016 65 084702]
[8]	Mei M F, Yu B M, Luo L, Cai J C 2010 Chin. Phys. Lett. 27 076862
[9]	Stone H A 1994 Annu. Rev. Fluid Mech. 26 65
[10]	Renardy Y 2008 Int. J. Multiphase Flow 34 1185
[11]	Guido S 2011 Curr. Opin. Colloid Interface Sci. 16 61
[12]	Sibillo V, Pasquariello G, Simeone M, Cristini V, Guido S 2006 Phys. Rev. Lett. 97 054502
[13]	Smith K A, Ottino J M, de la Cruz M O 2004 Phys. Rev. Lett. 93 204501
[14]	Hua H, Shin J, Kim J 2014 Int. J. Heat Fluid Flow 50 63
[15]	Patlazhan S, Vagner S, Kravchenko I 2015 Phys. Rev. E 91 063002
[16]	Wang J T, Liu J X, Han J J, Guan J 2013 Phys. Rev. Lett. 110 066001
[17]	Gao P, James J F 2011 J. Fluid Mech. 682 415
[18]	Brackbill J U, Kothe D B, Zemach C A 1992 J. Comput. Phys. 100 335
[19]	Hirt C W, Nichols B D 1981 J. Comput. Phys. 46 201
[20]	Renardy Y, Cristini V 2001 Phys. Fluids 13 2161
[21]	Taylor G I 1934 Proceedings of the Royal Society of London Series A 146 501
[22]	Chen Y P, Wu L Y, Zhang L 2015 Int. J. Heat Mass Transfer 82 42
[23]	Stone H A, Leal L G 1990 J. Fluid Mech. 211 123

施引文献

[1]	Lee D, Weitz D A 2008 Adv. Mater. 20 3498
[2]	Shum H C, Zhao Y J, Kim S H, Weitz D A 2011 Angew. Chem. Int. Ed. 123 1686
[3]	Zhao Y J, Zhao X W, Hu J, Xu M, Zhao W J, Sun L G, Zhu C, Xu H, Gu Z Z 2009 Adv. Mater. 21 569
[4]	Bychkov V, Modestov M, Law C K 2015 Prog. Energy Combust. Sci. 47 32
[5]	Moreau L, Levassort C, Blondel B, de Nonancourt C, Croix C, Thibonnet J, Balland-Longeau A 2009 Laser Part. Beams 27 537
[6]	Xu W, Lan Z, Peng B L, Wen R F, Ma X H 2015 Acta Phys. Sin. 64 216801 (in Chinese)[徐威, 兰忠, 彭本利, 温荣福, 马学虎2015 64 216801]
[7]	Huang H, Hong N, Liang H, Shi B C, Chai Z H 2016 Acta Phys. Sin. 65 084702 (in Chinese)[黄虎, 洪宁, 梁宏, 施保昌, 柴振华2016 65 084702]
[8]	Mei M F, Yu B M, Luo L, Cai J C 2010 Chin. Phys. Lett. 27 076862
[9]	Stone H A 1994 Annu. Rev. Fluid Mech. 26 65
[10]	Renardy Y 2008 Int. J. Multiphase Flow 34 1185
[11]	Guido S 2011 Curr. Opin. Colloid Interface Sci. 16 61
[12]	Sibillo V, Pasquariello G, Simeone M, Cristini V, Guido S 2006 Phys. Rev. Lett. 97 054502
[13]	Smith K A, Ottino J M, de la Cruz M O 2004 Phys. Rev. Lett. 93 204501
[14]	Hua H, Shin J, Kim J 2014 Int. J. Heat Fluid Flow 50 63
[15]	Patlazhan S, Vagner S, Kravchenko I 2015 Phys. Rev. E 91 063002
[16]	Wang J T, Liu J X, Han J J, Guan J 2013 Phys. Rev. Lett. 110 066001
[17]	Gao P, James J F 2011 J. Fluid Mech. 682 415
[18]	Brackbill J U, Kothe D B, Zemach C A 1992 J. Comput. Phys. 100 335
[19]	Hirt C W, Nichols B D 1981 J. Comput. Phys. 46 201
[20]	Renardy Y, Cristini V 2001 Phys. Fluids 13 2161
[21]	Taylor G I 1934 Proceedings of the Royal Society of London Series A 146 501
[22]	Chen Y P, Wu L Y, Zhang L 2015 Int. J. Heat Mass Transfer 82 42
[23]	Stone H A, Leal L G 1990 J. Fluid Mech. 211 123

[1]	杨迎国, 冯尚蕾, 李丽娜. 溶液法原位大面积制备钙钛矿光电薄膜成膜的同步辐射可视化结晶过程研究. , 2024, 73(6): 063201. doi: 10.7498/aps.73.20231847
[2]	李婷, 毕晓月, 孔婧文. 剪切形变下磷烯的力学和热学性能. , 2023, 72(12): 126201. doi: 10.7498/aps.72.20230084
[3]	俞莹丹, 林敏, 黄咏梅, 徐明. 四稳系统的双重随机共振特性. , 2021, 70(4): 040501. doi: 10.7498/aps.70.20201346
[4]	杨刚, 郑庭, 程启昊, 张会臣. 非牛顿流体剪切稀化特性的分子动力学模拟. , 2021, 70(12): 124701. doi: 10.7498/aps.70.20202116
[5]	方芳, 鲍麟, 童秉纲. 基于斜驻点模型的剪切层撞击壁面流动及传热特性. , 2020, 69(21): 214401. doi: 10.7498/aps.69.20201000
[6]	张冬冬, 谭建国, 姚霄. 入流激励下可压缩剪切层中Kelvin-Helmholtz涡的响应特性. , 2020, 69(2): 024701. doi: 10.7498/aps.69.20190681
[7]	郑麟, 莫松平, 李玉秀, 陈颖, 徐进良. 薄层剪切二元颗粒分离过程动力学特性分析. , 2019, 68(16): 164703. doi: 10.7498/aps.68.20190322
[8]	俞炜, 邓梓龙, 吴苏晨, 于程, 王超. Y型微通道内双重乳液流动破裂机理. , 2019, 68(5): 054701. doi: 10.7498/aps.68.20181877
[9]	李建欣, 柏财勋, 刘勤, 沈燕, 徐文辉, 许逸轩. 新型干涉高光谱成像系统的光束剪切特性分析. , 2017, 66(19): 190704. doi: 10.7498/aps.66.190704
[10]	张孝石, 许昊, 王聪, 陆宏志, 赵静. 水流冲击超声速气体射流实验研究. , 2017, 66(5): 054702. doi: 10.7498/aps.66.054702
[11]	姜艳, 刘贵立. 剪切形变对硼氮掺杂碳纳米管超晶格电子结构和光学性能的影响. , 2015, 64(14): 147304. doi: 10.7498/aps.64.147304
[12]	邓真渝, 章林溪. 流场环境下复杂囊泡的动力学行为. , 2015, 64(16): 168201. doi: 10.7498/aps.64.168201
[13]	孟凡净, 刘焜. 密集剪切颗粒流中速度波动和自扩散特性的离散元模拟. , 2014, 63(13): 134502. doi: 10.7498/aps.63.134502
[14]	李方浩, 章海军, 张冬仙. 环形定子的激光致表面波机理及可视化探测研究. , 2013, 62(22): 224209. doi: 10.7498/aps.62.224209
[15]	金叶青, 姚熊亮, 庞福振, 张阿漫. 均匀流中剪切变形加筋层合板声与振动特性研究. , 2013, 62(13): 134306. doi: 10.7498/aps.62.134306
[16]	张松鹏, 张向军, 田煜, 孟永钢. 采用液晶涂层测量介质流与壁面间剪切应力的定量模型与试验研究. , 2012, 61(23): 234702. doi: 10.7498/aps.61.234702
[17]	王晓东, 欧阳洁, 苏进. 非均匀剪切流场中液晶聚合物微观结构的无网格模拟. , 2010, 59(9): 6369-6376. doi: 10.7498/aps.59.6369
[18]	郑强, 岳萍, 龚伦训. Jacobi椭圆函数展开解的可视化. , 2005, 54(7): 2996-2999. doi: 10.7498/aps.54.2996
[19]	尤云祥, 缪国平, 刘应中. 用近场声学测量信息可视化多个三维障碍物的一种快速算法. , 2001, 50(6): 1103-1109. doi: 10.7498/aps.50.1103
[20]	韩申生, 朱士尧. KT-5B托卡马克等离子体中剪切Alfven波的激发特性. , 1991, 40(8): 1290-1297. doi: 10.7498/aps.40.1290

计量

文章访问数: 7164
PDF下载量: 260
被引次数: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

搜索

留言板