Liquid flow through converging microchannels and a comparison with diverging microchannels

被引:31
|
作者
Duryodhan, V. S. [1 ]
Singh, S. G. [2 ]
Agrawal, A. [1 ]
机构
[1] Indian Inst Technol, Dept Mech Engn, Bombay 400076, Maharashtra, India
[2] Indian Inst Technol, Dept Elect Engn, Hyderabad, Andhra Pradesh, India
关键词
poiseuille number; force balance; equivalent hydraulic diameter; fluidic diodicity; ENHANCEMENT; MICROPUMP; DESIGN;
D O I
10.1088/0960-1317/24/12/125002
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Diverging and converging microchannels are becoming an important part of microdevices. In this work, an experimental study of liquid flow through converging microchannels is performed and analyzed using results from 3D numerical simulations. Converging microchannels of various configurations: hydraulic diameter (118-177 mu m), length (10-30 mm) and convergence angle (4 degrees-12 degrees) are used to measure the pressure drop for a volume flow rate range of 0.5-5 ml min(-1) (8.33 x 10(-6)-8.33 x 10(-5) kg s(-1)) using deionised water as the working fluid. It is observed that the pressure drop in a converging microchannel varies non-linearly with the volume flow rate, and inversely with the convergence angle and hydraulic diameter. An equivalent hydraulic diameter is introduced in order to predict the overall pressure drop through the converging microchannel using the established theory for straight microchannels. The equivalent hydraulic diameter of the converging microchannel lies at 1/3.6th of the total length from the narrowest width of the microchannel; compared with 1/3rd for the diverging microchannel. A comparative analysis of flow through diverging and converging microchannels is also performed. It is shown that fluidic diodicity varies asymptotically with the angle and length of microchannels, whereas it increases with the volume flow rate. A theoretical expression for diodicity is also derived. The maximum fluidic diodicity is found to lie between 1.2 and 1.3. The data presented in this work is of fundamental importance and can help in optimizing the design of various microdevices.
引用
收藏
页数:13
相关论文
共 50 条
  • [41] Hydrodynamics of liquid-liquid Taylor flow in microchannels
    Gupta, Raghvendra
    Leung, Sharon S. Y.
    Manica, Rogerio
    Fletcher, David F.
    Haynes, Brian S.
    CHEMICAL ENGINEERING SCIENCE, 2013, 92 : 180 - 189
  • [42] Augmented mass transfer in liquid-liquid flow through microchannels of different geometries
    Kumar, Uttam
    Panda, Debashis
    Biswas, Koushik Guha
    CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2019, 137 : 72 - 79
  • [43] Adiabatic gas-liquid flow in microchannels
    Kawaji, M
    Chung, PMY
    MICROSCALE THERMOPHYSICAL ENGINEERING, 2004, 8 (03): : 239 - 257
  • [44] Boiling nucleation during liquid flow in microchannels
    Peng, XF
    Hu, HY
    Wang, BX
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1998, 41 (01) : 101 - 106
  • [45] FLOW INSIDE MICROCHANNELS WITH LIQUID-WALLS
    Malik, Tarun
    Fang, Nicholas X.
    PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, VOL 13, PTS A AND B, 2009, : 921 - 925
  • [46] Interfacial electrokinetic effects on liquid flow in microchannels
    Ren , LQ
    Qu, WL
    Li, DQ
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (16) : 3125 - 3134
  • [47] Evaluation of viscous dissipation in liquid flow in microchannels
    Xu, B
    Ooi, KT
    Mavriplis, C
    Zaghloul, ME
    JOURNAL OF MICROMECHANICS AND MICROENGINEERING, 2003, 13 (01) : 53 - 57
  • [48] Liquid flow through microchannels with grooved walls under wetting and superhydrophobic conditions
    B. Woolford
    D. Maynes
    B. W. Webb
    Microfluidics and Nanofluidics, 2009, 7 : 121 - 135
  • [49] Characterization of frictional pressure drop of liquid flow through curved rectangular microchannels
    Chu, Jiann-Cherng
    Teng, Jyh-Tong
    Xu, Ting-ting
    Huang, Suyi
    Jin, Shiping
    Yu, Xiang-fei
    Dang, Thanhtrung
    Zhang, Chun-ping
    Greif, Ralph
    EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2012, 38 : 171 - 183
  • [50] Modeling gas flow through microchannels and nanopores
    Roy, S
    Raju, R
    Chuang, HF
    Cruden, BA
    Meyyappan, M
    JOURNAL OF APPLIED PHYSICS, 2003, 93 (08) : 4870 - 4879