TY - GEN
T1 - Acoustic driven micro thermal bubble dynamics in a microchannel
AU - Qu, Xiaopeng
AU - Qiu, Huihe
PY - 2010
Y1 - 2010
N2 - Understanding the effects of acoustic vibration on micro thermal bubble dynamics in a microchannel is the key to develop acoustic-thermal-bubble based microfluidic devices. For that purpose, in the current research, a series of experiments were carried out to study the acoustic-thermal-bubble dynamics in a microchannel. The thermal bubble was generated by a micro heater which was fabricated by MEMS (Micro-Electro-Mechanical-System) technique. Using a high-speed digital camera, the thermal bubble dynamics was studied in two different conditions: normal condition and acoustic condition. Through theoretical analysis, the whole bubble dynamic process in two conditions can be roughly divided into four steps, which are bubble nucleation, satellite bubbles movement, bubble evolution, and bubble shrinkage and remove. The effects of acoustic vibration on all these four steps were found to be significant. The mechanisms behind these effects are discussed by analyzing the high speed video recording results. The current experimental investigation has some potential applications in microfluidic devices, and a prototype of micro mixer based on acoustic-thermal-bubble was successfully tested.
AB - Understanding the effects of acoustic vibration on micro thermal bubble dynamics in a microchannel is the key to develop acoustic-thermal-bubble based microfluidic devices. For that purpose, in the current research, a series of experiments were carried out to study the acoustic-thermal-bubble dynamics in a microchannel. The thermal bubble was generated by a micro heater which was fabricated by MEMS (Micro-Electro-Mechanical-System) technique. Using a high-speed digital camera, the thermal bubble dynamics was studied in two different conditions: normal condition and acoustic condition. Through theoretical analysis, the whole bubble dynamic process in two conditions can be roughly divided into four steps, which are bubble nucleation, satellite bubbles movement, bubble evolution, and bubble shrinkage and remove. The effects of acoustic vibration on all these four steps were found to be significant. The mechanisms behind these effects are discussed by analyzing the high speed video recording results. The current experimental investigation has some potential applications in microfluidic devices, and a prototype of micro mixer based on acoustic-thermal-bubble was successfully tested.
KW - Acoustic streaming
KW - Bubble dynamics
KW - MEMS
KW - Microfluid
UR - https://www.scopus.com/pages/publications/77954319693
U2 - 10.1115/mnhmt2009-18451
DO - 10.1115/mnhmt2009-18451
M3 - Conference Paper published in a book
AN - SCOPUS:77954319693
SN - 9780791843895
T3 - Proceedings of the ASME Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009
SP - 261
EP - 269
BT - Proceedings of the ASME Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009
T2 - ASME 2009 Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009
Y2 - 18 December 2009 through 21 December 2009
ER -