Open AccessInfluence of gas bubbles in valve-less micropump chamber on periodic driving pressure
Author(s) -
Dan Jiang,
Songjing Li,
Ping Yang
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.224703
Subject(s) - micropump , diffuser (optics) , nozzle , mechanics , materials science , volume (thermodynamics) , chamber pressure , bubble , gas pressure , mechanical engineering , thermodynamics , physics , engineering , optics , nanotechnology , petroleum engineering , light source
The appearance of gas bubbles in a valve-less micropump is generally undesirable as they can lead to performance deterioration, life reduction and even complete failure of the micropump. In order to predict influence of gas bubbles in valve-less micropump chamber on periodic driving pressure, the mathematical models, including volume change of chamber, continuity equation, effective bulk modulus and resistance coefficients of the nozzle and diffuser, are given to describe dynamic characteristics of piezoelectric valve-less nozzle/diffuser micropump. The influence of different gas bubble volume in chamber on the valve-less micropump periodic driving pressure is analyzed. Pressure pulsations with two gas bubbles into the valve-less micropump chamber are simulated and tested. Simulation and experimental results are given. Comparison of the results shows that the mathematical model and simulation method can handle the prediction of pressure pulsations accompanying gas bubble in the valve-less micropump.