Size-dependent bubble dynamics in a microchannel heat sink

Luthur Siu Lun Cheung, Man Lee, Yi Kuen Lee, Man Wong, Yitshak Zohar

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The height effect on bubble dynamics in a microchannel is experimentally studied. We reported that the critical size for a nucleation site to be active increases linearly with the channel height. However, once a bubble is formed, its evolution from incipience to departure can also be channel-size dependent. Thus, various microchannel heat sinks have been fabricated, about 5-10μm in height, with integrated temperature sensors utilizing Si-to-glass anodic bonding technology. Nucleation sites have been formed on the microchannels bottom silicon surface in order to ensure regular bubble formation, while the sensors allow continuous monitoring of the wall temperature. The microchannels are capped by a glass wafer; hence, it is possible to record the bubble activity using video equipment. The three aspects of bubble dynamics: growth rate, departure size and release frequency have been characterized experimentally, and proper control parameters have been identified.

Original languageEnglish (US)
Article numberWP3
Pages (from-to)670-673
Number of pages4
JournalProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
StatePublished - 2005
Event18th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2005 Miami - Miami Beach, FL, United States
Duration: Jan 30 2005Feb 3 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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