Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-24T02:41:11.508Z Has data issue: false hasContentIssue false
  • English
  • Français

Unsteady Analysis of the Flow Rectification Performance of Conical Microdiffuser Valves for Valveless Micropump Applications

Published online by Cambridge University Press:  05 May 2011

Y.-C. Wang ,
S.-H. Lin  and
D. Jang
Y.-C. Wang*
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
S.-H. Lin*
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
D. Jang*
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
*
* Associate Professor, corresponding author
** Master
** Master
Get access

Abstract

A numerical analysis of the unsteady flows in conical microdiffusers appropriate for valveless micropump applications is performed. The rectification efficiency of the diffuser valve is calculated directly as a function of geometric and operational parameters, including diffuser angle, diffuser slenderness, sizes of actuation chamber and inlet/outlet port, actuation frequency, and amplitude of actuation pressure. The computational results show that the diffuser with diverging angle of 10° and slenderness of 7.5 has the best rectification performance. For large actuation pressure amplitude, the optimal rectification efficiency and its corresponding Roshko number are relatively high. At the optimal Roshko number, the flow impedance is found to be dominated by fluid inertia. Sizes of the pump chamber and inlet/outlet port are shown to have a prominent effect on valve performance. Small actuation chamber or small inlet/outlet port can significantly deteriorate the valving performance of the diffuser.

Keywords

MicrodiffuserMicropumpRectification efficiencyRoshko number
Type
Articles
Information
Journal of Mechanics , Volume 26 , Issue 3 , September 2010 , pp. 299 - 307
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Stemme, E. and Stemme, G., “A Valveless Diffuser/Nozzle Fluid Pump,” Sensors and Actuators A, 39, pp. 159–167(1993).CrossRefGoogle Scholar
2.Olsson, A., Stemme, G. and Stemme, E., “A Valve-Less Planar Fluid Pump with two Pump Chambers,” Sensors and Actuators A, 46–47, pp. 549–556 (1995).CrossRefGoogle Scholar
3.Olsson, A., Stemme, G. and Stemme, E., “Diffuser-Element Design Investigation for Valve-Less Pumps,” Sensors and Actuators A, 57, pp. 137–143 (1996).CrossRefGoogle Scholar
4.Gerlach, T., “Microdiffusers as Dynamic Passive Valves for Mcropump Applications,” Sensors and Actuators A, 69, pp. 181–191(1998).CrossRefGoogle Scholar
5.Jiang, X. N., Zhou, Z. Y., Huang, X. Y., Li, Y., Yang, Y. and Liu, C. Y., “Micronozzle/Diffuser Flow and its Application in Micro Valveless Pumps,” Sensors and Ac-tuators A, 70, pp. 81–87 (1998).CrossRefGoogle Scholar
6.Olsson, A., Stemme, G. and Stemme, E., “Numerical and Experimental Studies of Flat-Walled Diffuser Elements for Valve-Less Micropumps,” Sensors and Actuators A, 84, pp. 165–175(2000).CrossRefGoogle Scholar
7.Cui, Q., Liu, C. and Zha, X. F., “Study on a Piezoelectric Micropump for the Controlled Drug Delivery System,” Microfluidics and Nanofluidics, 3, pp. 377–390 (2007).CrossRefGoogle Scholar
8.Olsson, A., Enoksson, P., Stemme, G. and Stemme, E., “A Valve-Less Planar Pump Isotropically Etched in Silicon,” Journal of Micromechanics and Microengneering, 6, pp. 87–91(1996).CrossRefGoogle Scholar
9.Olsson, A., Enoksson, P., Stemme, G. and Stemme, E., “Micromachined Flat-Walled Valveless Diffuser Pumps,” Journal of Micromechanics and Microengneering, 6, pp. 161–166(1997).Google Scholar
10.Gerlach, T. and Wurmus, H., “Working Principle and Performance of the Dynamic Micropump,” Sensors and Actuators A, 50, pp. 135–140 (1995).CrossRefGoogle Scholar
11.Lee, Y.-FL, Kang, T. G. and Cho, Y.-FL, “Characterization of Bi-Directionally Oscillating Dynamic Flow and Frequency-Dependent Rectification Performance of Microdiffusers,” Proceeding of IEEE Micro Electro Mechanical Systems, Miyazaki, Japan, pp. 403–408 (2000).Google Scholar
12.Kim, J. and Xu, X., “Laser-Based Fabrication of Polymer Micropump,” Journal of Microlithography Microfabrication and Microsystems, 3, pp. 152–158 (2004).Google Scholar
13.Sun, C.-L. and Huang, K. H., “Numerical Characterization of the Flow Rectification of Dynamic Microdiffusers,” Journal of Micromechanics and Microengneering, 16, pp. 1331–1339(2006).CrossRefGoogle Scholar
14.Wang, C.-T., Leu, T.-S. and Sun, J.-M., “Unsteady Analysis of Mcrovalves with No Moving Parts,” Journal of Mechanics, 23, pp.9–14 (2007).CrossRefGoogle Scholar
15.Peng, X. F., Peterson, G. P. and Wang, B. X., “Frictional Flow Characteristics of Water Flowing Through Rectangular Microchannels,” Experimental Heat Transfer, 7, pp. 249–264 (1994).CrossRefGoogle Scholar
16.Mala, G. M. and Li, D., “Flow Characteristics of Water in Microtubes,” International Journal of Heat and Fluid Flow, 20, pp. 142–148 (1999).CrossRefGoogle Scholar
17.Hetsroni, G., Mosyak, A., Pogrebnyak, E. and Yarin, L. P., “Fluid Flow in Micro-Channels,” International Journal of Heat and Mass Transfer, 48, pp. 1982–1998 (2005).CrossRefGoogle Scholar
18.Kohl, M. J., Abdel-Khahk, S. I., Jeter, S. M. and Sadowski, D. L., “An Experimental Investigation of MicroChannel Flow with Internal Pressure Measurements,” International Journal of Heat and Mass Transfer, 48, pp. 1518–1533 (2005).CrossRefGoogle Scholar
19.Yamahata, C, Lotto, C, Al-Assaf, E. and Gijs, M. A. M., “A PMMA Valveless Micropump Using Electromagnetic Actuation,” Microfluidics and Nanofluidics, 1, pp. 197–207 (2005).CrossRefGoogle Scholar
20.Xia, F., Tadigadapa, S. and Zhang, Q. M., “Electroactive Polymer Based Microfluidic Pump,” Sensors and Actuators A, 125, pp. 346–352 (2006).CrossRefGoogle Scholar