微通道内电渗压力混合驱动幂律流体流动模拟

罗艳; 李鸣; 杨大勇

doi:10.3879/j.issn.1000-0887.2016.04.005

微通道内电渗压力混合驱动幂律流体流动模拟

doi: 10.3879/j.issn.1000-0887.2016.04.005

¹南昌大学机电工程学院, 南昌 330031;²南昌大学信息工程学院, 南昌 330031

基金项目: 国家自然科学基金（11302095）

详细信息

作者简介:
罗艳（1990—），女，硕士生（E-mail： 13576997924@163.com）;杨大勇（1978—），男，副教授，博士(通讯作者. E-mail： dayongyang@ncu.edu.cn）.

中图分类号: O351.2
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- 文章访问数: 1862
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- 被引次数: 0
出版历程
- 收稿日期: 2015-11-25
- 修回日期: 2015-12-21
- 刊出日期: 2016-04-15

Simmulation of Mixed Electroosmotic and Pressure-Driven Flows of Power-Law Fluids in Microchannels

¹School of Mechanical & Electrical Engineering, Nanchang University,Nanchang 330031, P.R.China;²Information Engineering School, Nanchang University, Nanchang 330031, P.R.China

Funds: The National Natural Science Foundation of China（11302095）

摘要

摘要: 为了研究微通道内电渗压力混合驱动幂律流体的流动特性，建立了微通道内电渗压力混合驱动幂律流体的计算模型，其双电层电势、流体的流场分布分别由Poisson-Boltzmann（P-B）方程和Navier-Stokes(N-S)方程描述.讨论了无量纲Debye（德拜）参数K、壁面ζ^*电势和幂律指数n对流体流动特性和Poiseuille数的影响.结果表明，当压力梯度与外加电场方向一致（Γ ＞0）时，剪切变稀流体的速度大于剪切变稠流体；压力梯度与外加电场方向相反（Γ＜0）时，结果相反.Poiseuille数是无量纲Debye常数K、壁面ζ^*电势和幂律指数n的增函数.
- 微流体 /
- 幂律流体 /
- Poiseuille数 /
- 电渗流
Abstract: The pressure effects on electroosmotic flows of power-law fluids in microchannels were investigated. The electric double layer (EDL) potential was described with the Poisson-Boltzmann (P-B) equation, and the flow field distribution of the power-law fluid was characterized with the Navier-Stokes (N-S) equation. Numerical simulation was carried out to discuss the influences of the dimensionless Debye-Huckel parameter, the wall Zeta potential and the flow behavior index on the flow properties and the Poiseuille number. The results reveal that, in the case of the same pressure gradient direction with the electric field direction, the velocity of a shear-thinning fluid is higher than that of a shear-thickening one, whereas the result will be opposite for a reverse pressure gradient direction. The Poiseuille number is an increasing function of the dimensionless Debye-Huckel parameter, the Zeta potential and the flow behavior index.
- microfluidics /
- power-law fluid /
- Poiseuille number /
- electroosmotic flow

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参考文献(18)

[1]	Cheng S B, Skinner C D, Taylor J, Attiya S, Lee W E, Picelli G, Harrison D J. Development of a multichannel microfluidic analysis system employing affinity capillary electrophoresis for immunoassay[J]. Analytical Chemistry,2001,73(7): 1472-1479.
[2]	Buchholz B A, Doherty E A S, Albarghouthi M N, Bogdan F M, Zahn J M, Barron A E. Microchannel DNA sequencing matrices with a thermally controlled “viscosity switch”[J]. Analytical Chemistry,2001,73(2): 157-164.
[3]	Choban E R, Markoski L J, Wieckowski A, Kenis P J A. Microfluidic fuel cell based on laminar flow[J]. Journal of Power Sources,2004,128(1): 54-60.
[4]	李战华, 吴健康, 胡国庆, 胡国辉. 微流控芯片中的流体流动[M]. 北京: 科学出版, 2012.(LI Zhan-hua, WU Jian-kang, HU Guo-qing, HU Guo-hui. Fluid Flow in Microfluidic Chips [M]. Beijing: Science Press, 2012.(in Chinese))
[5]	XUAN Xiang-chun, LI Dong-qing. Electroosmotic flow in microchannels with arbitrary geometry and arbitrary distribution of wall charge[J]. Journal of Colloid and Interface Science,2005,289(1): 291-303.
[6]	Zimmerman W B, Rees J M, Craven T J. Rheometry of non-Newtonian electrokinetic flow in a microchannel T-junction[J]. Microfluidics and Nanofluidics,2006,2(6): 481-492.
[7]	Wang J, Wang M, Li Z. Lattice Poisson-Boltzmann simulations of electro-osmotic flows in microchannels[J]. Journal of Colloid and Interface Science,2006,296(2): 729-736.
[8]	Tang G H, Li X F, He Y L, Tao W Q. Electroosmotic flow of non-Newtonian fluid in microchannels[J]. Journal of Non-Newtonian Fluid Mechanics,2009,157(1/2): 133-137.
[9]	Tang G H, Ye P X, Tao W Q. Electroviscous effect on non-Newtonian fluid flow in microchannels[J]. Journal of Non-Newtonian Fluid Mechanics,2010,165(7/8): 435-440.
[10]	Hadigol M, Nosrati R, Raisee M. Numerical analysis of mixed electroosmotic/pressure driven flow of power-law fluids in microchannels and micropumps[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2011,374(1/3): 142-153.
[11]	Hadigol M, Nosrati R, Nourbakhsh A, Raisee M. Numerical study of electroosmotic micromixing of non-Newtonian fluids[J]. Journal of Non-Newtonian Fluid Mechanics,2011,166(17/18): 965-971.
[12]	杨大勇, 王阳. 微通道中电渗流及微混合的离子浓度效应[J]. 应用数学和力学, 2015,36(9): 981-989.(YANG Da-yong, WANG Yang. Effects of ion concentration on electroosmotic flow and micromixing in microchannels[J]. Applied Mathematics and Mechanics,2015,36(9): 981-989.(in Chinese))
[13]	Babaie A, Sadeghi A, Saidi M H. Combined electroosmotically and pressure driven flow of power-law fluids in a slit microchannel[J]. Journal of Non-Newtonian Fluid Mechanics,2011,166(14/15): 792-798.
[14]	Babaie A, Saidi M H, Sadeghi A. Electroosmotic flow of power-law fluids with temperature dependent properties[J]. Journal of Non-Newtonian Fluid Mechanics,2012,185/186: 49-57.
[15]	Brown A B D, Smith C G, Rennie A R. Pumping of water with ac electric fields applied to asymmetric pairs of microelectrodes[J]. Physical Review E,2000,63(1): 016305.
[16]	Mala G M, LI Dong-qing. Flow characteristics of water in microtubes[J]. International Journal of Heat and Fluid Flow,1999,20(2): 142-148.
[17]	Vocale P, Geri M, Cattani L, Spiga M. Electro-osmotic heat transfer in elliptical microchannels under H1 boundary condition[J]. International Journal of Thermal Sciences,2013,72: 92-101.
[18]	Zhao C, Zholkovskij E, Masliyah J H, Yang C. Analysis of electroosmotic flow of power-law fluids in a slit microchannel[J]. Journal of Colloid and Interface Science,2008,326(2): 503-510.

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微通道内电渗压力混合驱动幂律流体流动模拟

doi: 10.3879/j.issn.1000-0887.2016.04.005

作者简介:
罗艳（1990—），女，硕士生（E-mail： 13576997924@163.com）;杨大勇（1978—），男，副教授，博士(通讯作者. E-mail： dayongyang@ncu.edu.cn）.

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Simmulation of Mixed Electroosmotic and Pressure-Driven Flows of Power-Law Fluids in Microchannels

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留言板

微通道内电渗压力混合驱动幂律流体流动模拟

doi: 10.3879/j.issn.1000-0887.2016.04.005

作者简介: 罗艳（1990—），女，硕士生（E-mail： 13576997924@163.com）;杨大勇（1978—），男，副教授，博士(通讯作者. E-mail： dayongyang@ncu.edu.cn）.

计量

出版历程

Simmulation of Mixed Electroosmotic and Pressure-Driven Flows of Power-Law Fluids in Microchannels

计量

出版历程

目录

作者简介:
罗艳（1990—），女，硕士生（E-mail： 13576997924@163.com）;杨大勇（1978—），男，副教授，博士(通讯作者. E-mail： dayongyang@ncu.edu.cn）.