The aim of this paper is to develop a theoretical model of a piezoelectric valve-less micropump for liquid delivery with entrapped gas bubbles and evaluate the influence of gas bubbles on the dynamic characteristics of the micropump by using this model. In the model, we consider the vibration of piezoelectric diaphragm, the pressure loss through the nozzle/diffuser and the compressibility of working liquids with entrapped gas bubbles. In order to validate the developed model and make it useful as a design and prediction tool, experimental studies are carried out to investigate the flow rate and dynamic pressure inside the pump chamber when gas bubbles are absent or present in the micropump. The presence of gas bubbles inside the pump chamber is also observed with a high-speed video camera. The outlet flow rate of the micropump with different size of trapped gas bubbles are calculated and compared.
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ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer
March 3–6, 2012
Atlanta, Georgia, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-5477-8
PROCEEDINGS PAPER
Modeling and Influence Study of Gas Bubbles on Characteristics of a Piezoelectric Valve-Less Micropump
Songjing Li,
Songjing Li
Harbin Institute of Technology, Harbin, Heilongjiang, China
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Jixiao Liu,
Jixiao Liu
Harbin Institute of Technology, Harbin, Heilongjiang, China
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Dan Jiang
Dan Jiang
Harbin Institute of Technology, Harbin, Heilongjiang, China
Search for other works by this author on:
Songjing Li
Harbin Institute of Technology, Harbin, Heilongjiang, China
Jixiao Liu
Harbin Institute of Technology, Harbin, Heilongjiang, China
Dan Jiang
Harbin Institute of Technology, Harbin, Heilongjiang, China
Paper No:
MNHMT2012-75221, pp. 95-101; 7 pages
Published Online:
July 18, 2013
Citation
Li, S, Liu, J, & Jiang, D. "Modeling and Influence Study of Gas Bubbles on Characteristics of a Piezoelectric Valve-Less Micropump." Proceedings of the ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. Atlanta, Georgia, USA. March 3–6, 2012. pp. 95-101. ASME. https://doi.org/10.1115/MNHMT2012-75221
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