Skip to main content Accessibility help
×
Home

Unsteady Analysis of Microvalves With No Moving Parts

  • C.-T. Wang (a1), T.-S. Leu (a2) and J.-M. Sun (a2)

Abstract

No-moving-parts valves (NMPV) pumps produce the net volume flow due to the difference of pressure resistances between forward and reverse flow of a microchannel structure. NMPV has been developed by a number of research groups. However, most of NMPV in these studies are designed and based on steady state flow conditions. Little data is available regarding the NMPV in unsteady flow conditions. In this study, the performances of NMPV under both steady and unsteady flow conditions are investigated numerically. The NMPV used in this study is a diffuser-type microchannel with diffuser angle of 20° because of its outstanding production of net volume flow. By a series of numerical simulations, some useful results would be addressed for the performance of NMPV micropumps. First, Reynolds number confirmed by steady analysis should be greater than 10 (Re > 10) for the NMPV pumps to be more effective. Second, an optimal Strouhal number with maximum net volume flow rate is found at St = 0.013 for the unsteady flow condition. In addition, the relation between the driving pressure amplitude and net volume flow rate with a linear behavior found was helpful to the performance of the micropump system. According to these findings, it was easy for users to operate and design of NMPV micropumps.

Copyright

Corresponding author

*Assistant Professor
**Associate Professor
***Graduate student

References

Hide All
1.Maillefer, D., van Lintel, H., Rey-Mermet, G. and Hirschi, R., “A High-Performance Silicon Micropump for an Implantable Drug Delivery System,” Proc. of the 12th IEEE MEMS 1999 Technical Digest, Orlando, FL, USA, 1/17-21/99, pp. 541546 (1999).
2.Richter, M., Linnemann, R. and Woias, P., “Robust Design of Gas and Liquid Micropumps,” Sensors & Actuators A68, pp. 480486(1998).
3.van Lintel, H., van de Pol, F. and Bouwstra, S., “A Piezoelectric Micropump Based on Micromachining of Silicon,” Sensors & Actuators A15, pp. 153168 (1988).
4.Leu, T. S. and Ma, F. C., “Novel EHD-Pump Driven Micro Mixers,” Journal of Mechanics, 21, pp. 137144 (2005).
5.Ngyen, N. T., Huang, X. and Chuan, T. K., “MEMS-Micropumps: A Review,” Transactions of the ASME Journal of Fluids Engineering, 124(2), pp. 384392 (2002).
6.Shoji, S. and Esashi, M., “Microflow Devices and System,” Journal of Micromechanics and Microengineering, 4, pp. 157171 (1994).
7.Fuhr, G., Hagedorn, R., Muller, T., Benecke, W. and Wagner, B., “Pumping of Water Solution in Micro fabricated Electrohydrodynamic System,” Proc. IEEE-MEMS Workshop, pp. 25–29 (1992).
8.Ohnstein, T., Fukjura, T., Ridley, J. and Bonne, U., “Micromachined Silicon Microvalve,” Proc. IEEE Micro Electro Mechanical Syst. Workshop, Napa Valley, CA, Feb. 11∼14, pp. 9598(1990).
9.Tesla, N., “Valvular Conduit,” United States Patent, Patent No. 1 329 559(1920).
10.Stemme, E. and Allen, G., “A Valve-Less Diffuser/ Nozzle Based Fluid Pump,” Sensors and Actuator, A39, pp. 159167(1993).
11.Gerlach, T., Schuenmann, M. and Wurmus, H., “A New Micropump Principle of the Reciprocation Type Using Pyramidic Micro Flow Channels as Passive Valves,” Journal of Micromechanics and Microengineering, 5, pp. 199201 (1995).

Keywords

Unsteady Analysis of Microvalves With No Moving Parts

  • C.-T. Wang (a1), T.-S. Leu (a2) and J.-M. Sun (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed