TY - JOUR
T1 - Bubble dynamics for explosive microthermal dual bubbles
AU - Yang, I.-Da
AU - Tseng, Fangang
AU - Yu, Ru-Ji
AU - Chieng, Ching-Chang
PY - 2007/6
Y1 - 2007/6
N2 - 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 /m2 on two 30 × 60 μm2 heaters. The heaters are separated by different distances ranging from 25 to 125 μm. 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. © 2007 IEEE.
AB - 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 /m2 on two 30 × 60 μm2 heaters. The heaters are separated by different distances ranging from 25 to 125 μm. 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. © 2007 IEEE.
KW - Bubble-bubble Interactions
KW - Droplet injection
KW - Flow visualization
KW - Numerical simulation
KW - Thermal microbubble
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U2 - 10.1109/JMEMS.2007.892923
DO - 10.1109/JMEMS.2007.892923
M3 - RGC 21 - Publication in refereed journal
SN - 1057-7157
VL - 16
SP - 734
EP - 745
JO - Journal of Microelectromechanical Systems
JF - Journal of Microelectromechanical Systems
IS - 3
ER -