Effect of Joule heating on the electroosmotic microvortex and dielectrophoretic particle separation controlled by local electric field

被引:0
|
作者
严兵 [1 ]
陈波 [1 ]
熊永亮 [1 ]
彭泽瑞 [1 ]
机构
[1] School of Aerospace Engineering, Huazhong University of Science and Technology
基金
中国国家自然科学基金;
关键词
D O I
暂无
中图分类号
O361 [电磁流体力学];
学科分类号
080103 ;
摘要
Dielectrophoresis(DEP) technology has become important application of microfluidic technology to manipulate particles. By using a local modulating electric field to control the combination of electroosmotic microvortices and DEP, our group proposed a device using a direct current(DC) electric field to achieve continuous particle separation. In this paper,the influence of the Joule heating effect on the continuous separation of particles is analyzed. Results show that the Joule heating effect is caused by the local electric field, and the Joule heating effect caused by adjusting the modulating voltage is more significant than that by driving voltage. Moreover, a non-uniform temperature distribution exists in the channel due to the Joule heating effect, and the temperature is the highest at the midpoint of the modulating electrodes. The channel flux can be enhanced, and the enhancement of both the channel flux and temperature is more obvious for a stronger Joule heating effect. In addition, the ability of the vortices to trap particles is enhanced since a larger DEP force is exerted on the particles with the Joule heating effect; and the ability of the vortex to capture particles is stronger with a stronger Joule heating effect. The separation efficiency can also be increased because perfect separation is achieved at a higher channel flux. Parameter optimization of the separation device, such as the convective heat transfer coefficient of the channel wall,the length of modulating electrode, and the width of the channel, is performed.
引用
收藏
页码:316 / 325
页数:10
相关论文
共 50 条
  • [21] GLOBAL EFFECT OF AURORAL PARTICLE AND JOULE HEATING IN UNDISTURBED THERMOSPHERE
    HINTON, BB
    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1978, 83 (NA2): : 707 - 711
  • [22] Numerical study of joule heating effect on electroosmotic flow in rectangular microchannels with different aspect ratios
    Zhang, P
    Zuo, CC
    Zhou, DY
    Chen, HL
    Pan, H
    Wang, J
    Wu, D
    PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON FLUID POWER TRANSMISSION AND CONTROL, 2005, : 407 - 410
  • [23] Joule heating effect on a purely electroosmotic flow of non-Newtonian fluids in a slit microchannel
    Sanchez, S.
    Arcos, J.
    Bautista, O.
    Mendez, F.
    JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 2013, 192 : 1 - 9
  • [24] DUST PARTICLE HEATING IN RANDOM ELECTRIC FIELD
    Zasenko, V. I.
    Zagorodny, A. G.
    PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY, 2010, (04): : 250 - 253
  • [25] Iterative Dipole Moment Method for the Dielectrophoretic Particle-Particle Interaction in a DC Electric Field
    Zhang, Qing
    Zhang, Kai
    JOURNAL OF NANOTECHNOLOGY, 2018, 2018
  • [26] DYNAMICS OF A CHARGED PARTICLE IN ELECTROMAGNETIC FIELD WITH JOULE EFFECT
    Ershkov, Sergey, V
    Leshchenko, Dmytro
    ROMANIAN REPORTS IN PHYSICS, 2020, 72 (04)
  • [27] Microdevice for cell and particle separation using dielectrophoretic field-flow fractionation
    Müller, T
    Schnelle, T
    Gradl, G
    Shirley, SG
    Fuhr, G
    JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES, 2000, 23 (01) : 47 - 59
  • [28] Statistical properties of Joule heating rate, electric field and conductances at high latitudes
    Aikio, A. T.
    Selkala, A.
    ANNALES GEOPHYSICAE, 2009, 27 (07) : 2661 - 2673
  • [29] Infrared Microscopy of Joule Heating in Graphene Field Effect Transistors
    Bae, Myung-Ho
    Ong, Zhun-Yong
    Estrada, David
    Pop, Eric
    2009 9TH IEEE CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO), 2009, : 818 - 821
  • [30] Optimization of Fringing Field Effect Using Dielectric Separation and Local Electric Field Enhancement
    Yang, Lei
    Xia, Jun
    Zhang, Xiaobing
    JOURNAL OF DISPLAY TECHNOLOGY, 2015, 11 (03): : 242 - 247