NDLI: Acoustic Driven Micro Thermal Bubble Dynamics in a Microchannel

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Qu, Xiaopeng Qiu, Huihe
Copyright Year	2009
Abstract	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.
Sponsorship	Nanotechnology Institute
Starting Page	261
Ending Page	269
Page Count	9
File Format	PDF
ISBN	9780791843895
DOI	10.1115/MNHMT2009-18451
e-ISBN	9780791838648
Volume Number	ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 1
Conference Proceedings	ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer
Language	English
Publisher Date	2009-12-18
Publisher Place	Shanghai, China
Access Restriction	Subscribed
Subject Keyword	Bubble dynamics Mems Microfluid Acoustic streaming Microelectromechanical systems Acoustics Bubbles Dynamics (mechanics) Microchannels
Content Type	Text
Resource Type	Article

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