Browse > Article
http://dx.doi.org/10.5293/KFMA.2008.11.3.014

A Numerical Study on Flow Analysis of a Valveless Bidirectional Piezoelectric Micropump  

Lee, Sang-Hyuk (서강대학교 대학원)
Hur, Janet (서강대학교 공과대학)
Hur, Nahm-Keon (서강대학교 기계공학과)
Publication Information
The KSFM Journal of Fluid Machinery / v.11, no.3, 2008 , pp. 14-21 More about this Journal
Abstract
A numerical simulation on the flow field of a valveless bidirectional piezoelectric micropump has been performed. In this type of micropump, the oscillation of the piezoelectric diaphragm generates the blowing and suction flow through the oblique channel from the pumping chamber. The angle between the oblique and main channel causes the variation of flow distribution through upstream and downstream channels in suction and blowing modes. In the suction flow mode, the working fluid flows from both the upstream and downstream of the main channel to the pumping chamber through the oblique channel. However, in the blowing flow mode, the fluid pushed out of the pumping chamber flows more toward the downstream of the main channel due to the inertia of the fluid. In the present study, the effects of geometries such as the angle of oblique channel and the shape of main channel on the flow rate of the up/downstream were investigated. The flow rate obtained from the pump and the energy required to the pump were also analyzed for various displacements and frequencies of the oscillation of the diaphragm.
Keywords
Valveless Micropump; Oblique Channel; Diaphragm; CFD; Moving Mesh Technique;
Citations & Related Records
연도 인용수 순위
  • Reference
1 W. Wang and S.A. Soper, 2007, "Bio-MEMS Technologies and Application," CRC Press, pp. 150-163
2 M. Richter, R. Linnemann and P. Woias, 1998, "Robust Design of Gas and Liquid Micropumps," Sensors and Actuators A, Vol.68, pp.480-486   DOI   ScienceOn
3 V. Singhal, S.V. Garimella and J.Y. Murthy, 2004, "Low Reynolds Number Flow through Nozzle-Diffuser Elements in Valveless Micropumps," Sensors and Actuators A, Vol.113, pp. 226-235   DOI   ScienceOn
4 I.Y. Kim and A. Tezuka, 2003, "Optimization and Numerical Flow Analysis of a Valveless Micropump," JSME, Vol.46, No.2, pp. 772-778   DOI   ScienceOn
5 J. Jeong and C.N. Kim, 2007, "A Numerical Sumulation on Diffuser-Nozzle based Piezoelectric Micropumps with Two Different Numerical Models," International Journal for Numerical Methods in Fluids, Vol.53, pp. 561-571   DOI   ScienceOn
6 S.M. Sze, 1994, "Semiconductor Sensors," John Wiley & Sons, Inc
7 X.N. Jiang, Z.Y. Zhou, X.Y. Huang, Y. Li, Y. Yang and C.Y. Liu, 1998, "Micronozzle/diffuser Flow and its Application in Micro Valveless Pumps," Sensors and Actuators A, Vol.70, pp. 81-87   DOI   ScienceOn
8 A. Olsson, G. Stemme and E. Stemme, 2000, "Numerical and Experimental Studies of Flat-walled Diffuser Elements for Valve-less Micropumps," Sensors and Actuators A, Vol.84, pp. 165-175   DOI   ScienceOn
9 J.S. Yoon, J.W. Choi, I.H. Lee and M.S. Kim, 2006, "A Valveless Micropump for Bidirectional Application," Sensors and Actuators A, Vol.135, pp. 833-838   DOI   ScienceOn
10 2004, STAR-CD Version 3.20 Methodology, CD Adapco Group