A valve-less micro-pump was realized with just one diffuser/nozzle element. The pressure-loss in a nozzle is lower than that in a diffuser, and therefore one-way flow may be realized in the nozzle direction. The frequency characteristics and the pump characteristics are measured. Dimensionless numbers are introduced to rearrange the measured data and to understand the physical mechanisms of the micro-pump. Simplified analysis was done for unsteady operation of the pump by considering the channel geometries and pressure-loss coefficients based on Bernoulli’s theorem. The calculated pump characteristics agreed with the measured ones. Numerical calculations were made using the commercial CFD (computational fluid dynamics) code CFX. The calculated flow patterns showed differences between the diffuser and nozzle directions.
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ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer
June 6–9, 2008
Tainan, Taiwan
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4292-4
PROCEEDINGS PAPER
Analytical and Experimental Studies of Diffuser/Nozzle Valve-Less Micro-Pump
Seiichi Tanaka,
Seiichi Tanaka
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
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Shun Moriyama,
Shun Moriyama
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
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Hiroshi Tsukamoto,
Hiroshi Tsukamoto
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
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Koji Miyazaki
Koji Miyazaki
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
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Seiichi Tanaka
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Shun Moriyama
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Hiroshi Tsukamoto
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Koji Miyazaki
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Paper No:
MNHT2008-52209, pp. 203-210; 8 pages
Published Online:
June 22, 2009
Citation
Tanaka, S, Moriyama, S, Tsukamoto, H, & Miyazaki, K. "Analytical and Experimental Studies of Diffuser/Nozzle Valve-Less Micro-Pump." Proceedings of the ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B. Tainan, Taiwan. June 6–9, 2008. pp. 203-210. ASME. https://doi.org/10.1115/MNHT2008-52209
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