电场和剪切场耦合作用下双液滴聚结数值模拟

doi:10.7623/syxb201502014

石油学报 ›› 2015, Vol. 36 ›› Issue (2): 238-245.DOI: 10.7623/syxb201502014

电场和剪切场耦合作用下双液滴聚结数值模拟

吕宇玲¹, 田成坤¹, 何利民¹, 张倩², 王朝霞²

1. 中国石油大学储运与建筑工程学院山东青岛 266580;
2. 中国石油集团工程设计有限责任公司北京迪威尔石油天然气技术开发有限公司北京 100083

收稿日期:2014-06-13 修回日期:2014-11-14 出版日期:2015-02-25 发布日期:2015-02-05
通讯作者: 吕宇玲,女,1971年9月生,1995年获石油大学(华东)学士学位,2012年获中国石油大学(华东)博士学位,现为中国石油大学(华东)教授、硕士生导师,主要从事多相管流及油气田集输技术研究与教学工作。Email:lyl8391811@163.com
作者简介:吕宇玲,女,1971年9月生,1995年获石油大学(华东)学士学位,2012年获中国石油大学(华东)博士学位,现为中国石油大学(华东)教授、硕士生导师,主要从事多相管流及油气田集输技术研究与教学工作。Email:lyl8391811@163.com
基金资助:
国家自然科学基金项目(No.51274233)资助。

Numerical simulations on the double-droplets coalescence under the coupling effects of electric field and shearing field

Lü Yuling¹, Tian Chengkun¹, He Limin¹, Zhang Qian², Wang Zhaoxia²

1. College of Pipeline and Civil Engineering, China University of Petroleum, Shandong Qingdao 266580, China;
2. DWELL Company Limited, CNPC Engineering Company Limited, Beijing 100083, China

Received:2014-06-13 Revised:2014-11-14 Online:2015-02-25 Published:2015-02-05

摘要/Abstract

摘要：

静电聚结设备中的液滴行为属于电流体动力学研究的重要内容,采用相场(phase-field)法,将电场与剪切场进行双向耦合,建立电场和剪切场协同作用下双液滴运动、聚结数值模型,采用微观实验对数值模型的准确性进行验证,研究双液滴的运动、聚结规律及毛细数、电毛细数、剪切强度和液滴粒径等因素对双液滴聚结速率的影响。研究结果表明,电场和剪切场协同作用下双液滴的动态行为分为不聚结、聚结和聚结后破裂3种类型;电场和剪切场协同作用比单一场作用下的聚结效率提高63% ~94% ;毛细数、电毛细数及雷诺数对双液滴聚结时间的影响规律较好地符合Holliday函数,一定范围内三者的增大均能明显提高双液滴聚结效率。本研究为复杂湍流场中液滴的电聚结和新型静电聚结设备的优化提供了理论基础。

关键词: 液滴, 相场法, 电场, 剪切场, 聚结

Abstract:

Studies on electrohydrodynamics mainly focus on the liquid droplets in electrostatic coalescence equipment. In the present study, the electric field and shearing field is bi-directionally coupled using phase-field method; a numerical simulation model is established for double-droplets movement and coalescence under the synergistic effects of two fields; and the accuracy of this model is verified by microscopic experiments. Further, this study explores the impact of the law of double-droplets movement and coalescence, as well as capillary number, electro-capillary number, shearing strength and droplet size on the coalescence rate. The results indicate that under the synergistic effects of electric field and shearing filed, the dynamic behaviors of double-droplets can be divided into three types, i.e., non-coalescence, coalescence and break-up after coalescence. The coalescence efficiency in the coupling field can be improved by 63% ~94%, as compared with that in a single field. The influence of three factors including capillary number, electro-capillary number and Reynolds number on double-droplets coalescence time fits well with the Holliday function, and the coalescence rate can be significantly enhanced with the three factors increasing within a certain range. This study will provide a theoretical base for exploring the electro-coalescence of droplets in a complex turbulent flow field and optimizing the novel electrostatic coalescence equipment.

Key words: liquid droplet, phase-field method, electric field, shearing field, coalescence

中图分类号:

TE866

吕宇玲, 田成坤, 何利民, 张倩, 王朝霞. 电场和剪切场耦合作用下双液滴聚结数值模拟[J]. 石油学报, 2015, 36(2): 238-245.

Lü Yuling, Tian Chengkun, He Limin, Zhang Qian, Wang Zhaoxia. Numerical simulations on the double-droplets coalescence under the coupling effects of electric field and shearing field[J]. Acta Petrolei Sinica, 2015, 36(2): 238-245.

参考文献

[1] Kokal S L.Crude oil emulsions:a state-of-the-art review[R].SPE 77497,2005.
[2] Eow J S,Ghadiri M.Electrostatic enhancement of coalescence of water droplets in oil:a review of the technology[J].Chemical Engineering Journal,2002,85(2/3):357-368.
[3] Less S,Hannisdal A,Sjblom J.Dehydration efficiency of water-in-crude oil emulsions in alternating current electrical fields[J].Journal of Dispersion Science and Technology,2010,31(3):265-272.
[4] Harpur I G,Wayth N J,Bailey A G,et al.Destabilisation of water-in-oil emulsions under the influence of an A.C.electric field:experimental assessment of performance[J].Journal of Electrostatics,1997,40-41:135-140.
[5] Urdahl O,Wayth N J,Frdedal H,et al.Compact electrostatic coalescer technology[M]//Encyclpedic Handbook of Emulsion Technology.New York:Marcel Dekker,2001:679-694.
[6] Noik C,Chen Jiaqing,Dalmazzone C S H.Electrostatic demulsification on crude oil:a state-of-the-art review[R].SPE 103808,2006.
[7] Tomar G,Gerlach D,Biswas G,et al.Two-phase electrohydrodynamic simulations using a volume-of-fluid approach[J].Journal of Computational Physics,2007,227(2):1267-1285.
[8] Hua Jinsong,Lim L K,Wang C H.Numerical simulation of deformation/motion of a drop suspended in viscous liquids under influence of steady electric fields[J].Physics of Fluids,2008,20(11):113-302.
[9] Baygents J C,Rivette N J,Stone H A.Electrohydrodynamic deformation and interaction of drop pairs[J].Journal of Fluid Mechanics,1998,368(1):359-375.
[10] Melheim J A,Chiesa M.Simulation of turbulent electrocoalescence[J].Chemical Engineering Science,2006,61(14): 4540-4549.
[11] Shardt O,Derksen J J,Mitra S K.Simulations of droplet coalescence in simple shear flow[J].Langmuir,2013,29(21): 6201-6212.
[12] Sui Y,Chen X B,Chew Y T,et al.Numerical simulation of capsule deformation in simple shear flow[J].Computers and Fluids,2010,39(2):242-250.
[13] Yue Pengtao,Feng J J,Liu Chun,et al.Diffuse-interface simulations of drop coalescence and retraction in viscoelastic fluids[J].Non-Newtonian Fluid Mechanics,2005,129(3):163-176.
[14] Hu H H,Patankar N A,Zhu M Y.Direct numerical simulations of fluid-solid systems using the arbitrary Lagrangian–Eulerian technique[J].Journal of Computational Physics,2001,169(2):427-462.
[15] Yue Pengtao,Zhou Chunfeng,Feng J J,et al.Phase-field simulations of interfacial dynamics in viscoelastic fluids using finite elements with adaptive meshing[J].Journal of Computational Physics,2006,219(1):47-67.
[16] Teigen K E,Munkejord S T.Sharp-interface simulations of drop deformation in electric fields[J].IEEE Transactions on Dielectrics and Electrical Insulation,2009,16(2):475-482.
[17] Yue Pengtao,Feng J J,Liu Chun,et al.A diffuse-interface method for simulating two-phase flows of complex fluids[J].Journal of Fluid Mechanics,2004,515:293-317.
[18] Jacqmin D.Calculation of two-phase Navier-Stokes flows using phase-field modeling[J].Journal of Computational Physics,1999,155(1):96-127.
[19] Eow J S,Ghadiri M.Drop-drop coalescence in an electric field:the effects of applied electric field and electrode geometry[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2003,219(1-3):253-279.
[20] He Limin,Yang Donghai,Gong Rongna,et al.An investigation into the Deformation,movement and coalescence characteristics of water-in-oil droplets in an AC electric field[J].Petroleum Science,2013,10(4):548-561.
[21] Siu Y L,Wan J T K,Yu K W.Interparticle force in polydisperse electrorheological fluid:Beyond the dipole approximation[J].Computer Physics Communications,2001,142(1/3):446-452.
[22] Leal L G.Flow induced coalescence of drops in a viscous fluid[J].Physics of Fluids,2004,16(6):1833-1851.
[23] 杨东海,何利民,罗小明,等.新型静电聚结器中水滴聚结特性研究[J].高校化学工程学报,2012,26(2):222-227.
Yang Donghai,He Limin,Luo Xiaoming,et al.Investigation on coalescence characteristics of water droplets in new type electrostatic coalescer[J].Journal of Chemical Engineering of Chinese Universities,2012,26(2):222-227.
[24] 黄启玉,王蕾.微观液滴分布对含蜡原油乳状液流变性的影响[J].石油学报,2013,34(4):765-774.
Huang Qiyu,Wang Lei.Effect of droplet distribution on rheological properties of water-in-oil emulsion in waxy crude oils[J].Acta Petrolei Sinica,2013,34(4):765-774.

电场和剪切场耦合作用下双液滴聚结数值模拟

Numerical simulations on the double-droplets coalescence under the coupling effects of electric field and shearing field

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 12

编辑推荐

Metrics

本文评价

[1]	许林, 刘书杰, 许明标, 冯桓榰, 邢希金, 邓佳佳. 压差激活密封剂的微缺陷自适应修复行为及机理[J]. 石油学报, 2021, 42(5): 686-694.
[2]	陈家庆, 王强强, 肖建洪, 安申法, 郝金克, 张明, 王秀军, 栾智勇, 姬宜朋. 高含水油井采出液预分水技术发展现状与展望[J]. 石油学报, 2020, 41(11): 1434-1444.
[3]	潘杰, 王武杰, 王亮亮, 张丽, 陈军斌, 蒲雪雷. 考虑液滴夹带的气井连续携液预测模型[J]. 石油学报, 2019, 40(3): 332-336.
[4]	王爱国, 张胜传, 余洲, 张金成, 何广利, 程运甫, 王浩然, 田福春. 稳定电场压裂裂缝监测技术[J]. 石油学报, 2016, 37(S2): 87-92.
[5]	黄启玉, 王蕾. 微观液滴分布对含蜡原油乳状液流变性的影响[J]. 石油学报, 2013, 34(4): 765-774.
[6]	裴海华　张贵才　葛际江　蒋　平. 稠油碱驱中液滴流提高采收率机理[J]. 石油学报, 2012, 33(4): 663-669.
[7]	王志彬　李颖川. 气井连续携液机理[J]. 石油学报, 2012, 33(4): 681-686.
[8]	张黎明张凯李晓帆 Mojtaba Ghadiri Ali Hassanpour. 高强电场中液滴静电运动特性[J]. 石油学报, 2011, 32(3): 524-528.
[9]	王玮宫敬李晓平. 非牛顿稠油包水乳状液的剪切稀释性[J]. 石油学报, 2010, 31(6): 1024-1026.
[10]	王玮, 宫敬. 油水两相管流反相模型研究[J]. 石油学报, 2008, 29(1): 139-142,148.
[11]	黄柳宾, 刘彦民, 关继腾, 柴文妍, 李文瀛. 雷电过程地面电场变化与油库雷电安全报警[J]. 石油学报, 2001, 22(3): 91-95.
[12]	刘彦民, 李祖奎. 物理场致水泥浆改性实验研究[J]. 石油学报, 2000, 21(5): 91-94.