MODELING AND INFLUENCE STUDY OF GAS BUBBLES ON CHARACTERISTICS OF A PIEZOELECTRIC VALVE-LESS MICROPUMP

被引：0
作者：
Li, Songjing [1 ]
Liu, Jixiao [1 ]
Jiang, Dan
机构：
[1] Harbin Inst Technol, Dept Fluid Control & Automat, Harbin 150006, Heilongjiang Pr, Peoples R China
来源：
PROCEEDINGS OF THE ASME MICRO/NANOSCALE HEAT AND MASS TRANSFER INTERNATIONAL CONFERENCE, 2012 | 2012年
关键词：
microfluidic system; micropump; gas bubbles; valve-less micropump; FLOW; MECHANISM;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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.
引用
收藏
页码：95 / 101
页数：7
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