Bubble Dynamics for Explosive Microthermal Dual Bubbles

Bubble dynamics of explosive microthermal dual bubbles including the growth and collapse process are investigated experimentally in detail. The dual bubbles are generated with supplied heat flux of 1.61 GW/m 2 on two 30 times 60 mum 2 heaters. The heaters are separated by different distances ranging...

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Bibliographic Details
Published in:Journal of microelectromechanical systems 2007-06, Vol.16 (3), p.734-745
Main Authors: YANG, I-Da, TSENG, Fangang, YU, Ru-Ji, CHIENG, Ching-Chang
Format: Article
Language:English
Subjects:
Anisotropic magnetoresistance
Bubble-bubble Interactions
Bubbles
Collapse
droplet injection
Droplets
Dynamics
Exact sciences and technology
Explosions
Explosives
flow visualization
Fuels
Heat flux
Heaters
Heating equipment
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Mechanical instruments, equipment and techniques
Microfluidics
Micromechanical devices and systems
Numerical simulation
Physics
Resistance heating
Satellites
Thermal expansion
thermal microbubble
Visualization
Voltage
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Summary:Bubble dynamics of explosive microthermal dual bubbles including the growth and collapse process are investigated experimentally in detail. The dual bubbles are generated with supplied heat flux of 1.61 GW/m 2 on two 30 times 60 mum 2 heaters. The heaters are separated by different distances ranging from 25 to 125 mum. As the heaters get closer in x-direction, higher anisotropic degree in directional extensions of dual bubbles is obtained with faster bubble expansion velocity during collapse in x-, y-, and z-directions. In addition, the bubble lifetime is shorter as the two heaters are separated more although the supplied heat flux is the same. Furthermore, one application of dual bubble system actuating the droplet formation demonstrates that the droplet formation process with no satellites can be achieved by adjusting the expansion rate of bubbles or the spacing between two heaters.
ISSN:1057-7157
1941-0158
DOI:10.1109/JMEMS.2007.892923