Journal of Hydrodynamics

, Volume 31, Issue 2, pp 413–420 | Cite as

Three-dimensional flow field simulation of steady flow in the serrated diffusers and nozzles of valveless micro-pumps

  • Ying-hua Xu
  • Wei-ping YanEmail author
  • Kai-rong Qin
  • Tun Cao


This paper presents a three-dimensional flow field simulation of the steady flows through diffusers and nozzles with straight or serrated-sided walls to analyze the effect of the channel structure on the flow characteristics. The pressure and velocity profiles in the diffusers and the nozzles as well as the net volumetric flow rate are determined. Our simulation demonstrates that the pressure and velocity profiles in the serrated diffuser/nozzles are more complicated than those with the straight-sided wall, while the net steady flow rate with the straight-sided wall increases monotonically with the increase of the pressure difference, the steady flow rate with serrated sided walls increases gradually to reach a maximum and then decreases with the increase of the pressure difference. The results suggest that the number of the sawteeth plays a significant role in optimizing the design of serrated diffusers and nozzles for improving the transport efficiency of valveless micro-pumps.

Key words

Valveless micro-pump steady flow diffuser and nozzle serrated-sided wall three-dimensional flow field simulation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Kamaruddin M. Z. F., Kamarudin S. K., Daud W. R. W. et al. An overview of fuel management in direct methanol fuel cells [J]. Renewable and Sustainable Energy Reviews, 2013, 24: 557–565.CrossRefGoogle Scholar
  2. [2]
    Kwon K., Kim D. Efficient water recirculation for portable direct methanol fuel cells using electroosmotic pumps [J]. Journal of Power Sources, 2013, 221: 172–176.CrossRefGoogle Scholar
  3. [3]
    Gensler H., Sheybani R., Li P. et al. An implantable MEMS micropump system for drug delivery in small animals [J]. Biomedical Microdevices, 2012, 14(3): 483–496.CrossRefGoogle Scholar
  4. [4]
    Tang G., Han Y., Lau B. L. et al. Development of a compact and efficient liquid cooling system with silicon microcooler for high-power microelectronic devices [J]. IEEE Transactions on Components, Packaging and Manufacturing Technology, 2016, 6(5): 729–739.CrossRefGoogle Scholar
  5. [5]
    Wen C., Yeh S., Leong K. et al. Application of a valveless impedance pump in a liquid cooling system [J]. IEEE Transactions on Components, Packaging and Manufacturing Technology, 2013, 3(5): 783–791.CrossRefGoogle Scholar
  6. [6]
    Patel K., Bartsch M., Mccrink M. et al. Electrokinetic pumping of liquid propellants for small satellite microthruster applications [J]. Sensors and Actuators B: Chemical, 2008, 132(2): 461–470.CrossRefGoogle Scholar
  7. [7]
    Yu M., Zheng X. X., Tang H. Y. et al. A microfluidic chip for sperm sorting [J]. Chinese Journal of Hydrodynamics, 2015, 30(6): 612–618(in Chinese).Google Scholar
  8. [8]
    Jiang D., Li S. J. The dynamic characteristics of a valveless micropump [J]. Chinese Physics B, 2012, 21(7): 74701.MathSciNetCrossRefGoogle Scholar
  9. [9]
    Chandika S., Asokan R., Vijayakumar K. C. K. Flow characteristics of the diffuser/nozzle micropump—A state space approach [J]. Flow Measurement and Instrumentation, 2012, 28: 28–34.CrossRefGoogle Scholar
  10. [10]
    Tseng L. Y., Yanf A. S., Lee C. Y. et al. Investigation of a piezoelectric valveless micropump with an integrated stainless-steel diffuser/nozzle bulge-piece design [J]. Smart Materials and Structures, 2013, 22(8): 85012–85023.CrossRefGoogle Scholar
  11. [11]
    Torniainen E. D., Govyadinov A. N., Markel D. P. et al. Bubble-driven inertial micropump [J]. Physics of Fluids, 2012, 24(12): 122003.CrossRefGoogle Scholar
  12. [12]
    Lee S., Kuan Y., Sung M. Diaphragm air-liquid micro pump applicable to the direct methanol fuel cell [J]. Journal of Power Sources, 2013, 238: 290–295.CrossRefGoogle Scholar
  13. [13]
    Lee K. S., Kim B., Shannon M. A. An electrostatically driven valve-less peristaltic micropump with a stepwise chamber [J]. Sensors and Actuators A: Physical, 2012, 187: 183–189.CrossRefGoogle Scholar
  14. [14]
    Kano I., Nishina T. Effect of electrode arrangements on EHD conduction pumping [J]. IEEE Transactions on Industry Applications, 2013, 49(2): 679–684.CrossRefGoogle Scholar
  15. [15]
    Yu H., Yu J., Ma C. Design, fabrication and experimental research for an electrohydrodynamic micropump [J]. Science China Technological Sciences, 2010, 53(10): 2839–2845.CrossRefGoogle Scholar
  16. [16]
    Stemme E., Stemme G. A valveless diffuser/nozzle-based fluid pump [J]. Sensors and Actuators A: Physical, 1993, 39(2): 159–167.CrossRefGoogle Scholar
  17. [17]
    Salari A., Dalton C. A novel AC electrothermal micro-pump for biofluid transport using circular interdigitated microelectrode array [C]. Proceedings of SPIE, San Francisco, USA, 2015, 9320.Google Scholar
  18. [18]
    Sima A. H., Salari A., Shafii M. B. Low-cost reciprocating electromagnetic-based micropump for high-flow rate applications [J]. Journal of Micro-Nanolithography MEMS and MOEMS, 2015, 14: 0350033.Google Scholar
  19. [19]
    Kim B. H., Kim I. C., Kang Y. J. et al. Effect of phase shift on optimal operation of serial-connected valveless micropumps [J]. Sensors and Actuators A: Physical, 2014, 209: 133–139.CrossRefGoogle Scholar
  20. [20]
    Wang T., He J., An C. et al. Study of the vortex based virtual valve micropump [J]. Journal of Micromechanics and Microengineering, 2018, 28: 12500712.Google Scholar
  21. [21]
    Wang T., He J., Wang J. J. Numerical and experimental study of valve-less micropump using dynamic multi-physics model [C]. 2018 IEEE 13th Annual International Conference on Nano/Micro Engineered and Molecular Systems(NEMS), Singapore, 2018.Google Scholar
  22. [22]
    Izzo I., Accoto D., Menciassi A. et al. Modeling and experimental validation of a piezoelectric micropump with novel no-moving-part valves [J]. Sensors and Actuators A: Physical, 2007, 133(1): 128–140.CrossRefGoogle Scholar
  23. [23]
    Zhu K. Q., Xu C. X. Viscous fluid mechanics [M]. Beijing, China: China Higher Education Press, 2009(in Chinese).Google Scholar
  24. [24]
    Guan Y. F., Zhang G. X., Yu Z. Y. Fabrication and experiments of piezoelectric micropump with novel saw-tooth microchannels [J]. Nanotechnology and Precision Engineering, 2010, 8(2): 149–155.Google Scholar

Copyright information

© China Ship Scientific Research Center 2018

Authors and Affiliations

  • Ying-hua Xu
    • 1
  • Wei-ping Yan
    • 1
    Email author
  • Kai-rong Qin
    • 2
  • Tun Cao
    • 2
  1. 1.School of Energy and Power EngineeringDalian University of TechnologyDalianChina
  2. 2.School of Optoelectronic Engineering and Instrumentation ScienceDalian University of TechnologyDalianChina

Personalised recommendations