Particle Focusing under Newtonian and Viscoelastic Flow in a Straight Rhombic Microchannel

被引:14
作者
Kwon, Joo-Yong [1 ]
Kim, Taehoon [1 ,2 ]
Kim, Jungwoo [1 ,2 ]
Cho, Younghak [1 ,2 ]
机构
[1] Seoul Natl Univ Sci & Technol, Dept Mech Design & Robot Engn, 232 Gongneung Ro, Seoul 01811, South Korea
[2] Seoul Natl Univ Sci & Technol, Dept Mech Syst Design Engn, 232 Gongneung Ro, Seoul 01811, South Korea
基金
新加坡国家研究基金会;
关键词
rhombic microchannel; elasto-inertial particle focusing; Newtonian fluid; viscoelastic fluid; MIGRATION; FLUIDS; SEPARATION;
D O I
10.3390/mi11110998
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Particle behavior in viscoelastic fluids has attracted considerable attention in recent years. In viscoelastic fluids, as opposed to Newtonian fluids, particle focusing can be simply realized in a microchannel without any external forces or complex structures. In this study, a polydimethylsiloxane (PDMS) microchannel with a rhombic cross-sectional shape was fabricated to experimentally investigate the behavior of inertial and elasto-inertial particles. Particle migration and behavior in Newtonian and non-Newtonian fluids were compared with respect to the flow rate and particle size to investigate their effect on the particle focusing position and focusing width. The PDMS rhombic microchannel was fabricated using basic microelectromechanical systems (MEMS) processes. The experimental results showed that single-line particle focusing was formed along the centerline of the microchannel in the non-Newtonian fluid, unlike the double-line particle focusing in the Newtonian fluid over a wide range of flow rates. Numerical simulation using the same flow conditions as in the experiments revealed that the particles suspended in the channel tend to drift toward the center of the channel owing to the negative net force throughout the cross-sectional area. This supports the experimental observation that the viscoelastic fluid in the rhombic microchannel significantly influences particle migration toward the channel center without any external force owing to coupling between the inertia and elasticity.
引用
收藏
页数:12
相关论文
共 30 条
  • [1] The inertial lift on a spherical particle in a plane Poiseuille flow at large channel Reynolds number
    Asmolov, ES
    [J]. JOURNAL OF FLUID MECHANICS, 1999, 381 : 63 - 87
  • [2] Inertial microfluidics
    Di Carlo, Dino
    [J]. LAB ON A CHIP, 2009, 9 (21) : 3038 - 3046
  • [3] Progress of Inertial Microfluidics in Principle and Application
    Gou, Yixing
    Jia, Yixuan
    Wang, Peng
    Sun, Changku
    [J]. SENSORS, 2018, 18 (06)
  • [4] DNA-based highly tunable particle focuser
    Kang, Kyowon
    Lee, Sung Sik
    Hyun, Kyu
    Lee, Seong Jae
    Kim, Ju Min
    [J]. NATURE COMMUNICATIONS, 2013, 4
  • [5] Inertial focusing in non-rectangular cross-section microchannels and manipulation of accessible focusing positions
    Kim, J.
    Lee, J.
    Wu, C.
    Nam, S.
    Di Carlo, D.
    Lee, W.
    [J]. LAB ON A CHIP, 2016, 16 (06) : 992 - 1001
  • [6] Inertial focusing in a parallelogram profiled microchannel over a range of aspect ratios
    Kwon, Joo Young
    Lee, Dong-Ki
    Kim, Jungwoo
    Cho, Young Hak
    [J]. MICRO AND NANO SYSTEMS LETTERS, 2019, 7 (01)
  • [7] Fabrication of microfluidic channels with various cross-sectional shapes using anisotropic etching of Si and self-alignment
    Lee, Dong-Ki
    Kwon, Joo Yong
    Cho, Young Hak
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2019, 125 (05):
  • [8] Numerical study on secondary flows of viscoelastic fluids in straight ducts: Origin analysis and parametric effects
    Li, Yu-Ke
    Zheng, Zhi-Ying
    Zhang, Hong-Na
    Li, Feng-Chen
    Qian, Shizhi
    Joo, Sang Woo
    Kulagina, Ludmila V.
    [J]. COMPUTERS & FLUIDS, 2017, 152 : 57 - 73
  • [9] Lateral migration of particles suspended in viscoelastic fluids in a microchannel flow
    Lim, Hyunjung
    Nam, Jeonghun
    Shin, Sehyun
    [J]. MICROFLUIDICS AND NANOFLUIDICS, 2014, 17 (04) : 683 - 692
  • [10] Size-Based Separation of Particles and Cells Utilizing Viscoelastic Effects in Straight Microchannels
    Liu, Chao
    Xue, Chundong
    Chen, Xiaodong
    Shan, Lei
    Tian, Yu
    Hu, Guoqing
    [J]. ANALYTICAL CHEMISTRY, 2015, 87 (12) : 6041 - 6048