Two-phase flow boiling in a microchannel heat sink

Man Lee, Yiu Yan Wong, Man Wong, Yitshak Zohar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A micro heat sink comprising 10 microchannels integrated with a local heater and a temperature miciosensor array has been fabricated on a silicon wafer using standard micromachining techniques. A glass wafer was anodically bonded to the silicon wafer in order to cap the trapezoidal microchannels, about 14μm in depth and 120μm in average width. DI water was pressurized through the heat sink serving as the working fluid. Boiling curves of device temperature, at a few locations along the centerline, were measured as a function of the input power. In contrast to previously reported results, the boiling plateau associated with latent heat of phase change from liquid to vapor was detected. The transparent glass ceiling allowed the visualizations of flow phenomena dominated by surface effects. The classical bubble dynamics of bubble formation, growth, and detachment was observed at relatively low input power. However, this mode was completely suppressed at moderate power levels. Further increase of the input power resulted in a clear separation between the upstream vapor and the downstream liquid. The average location of the vapor/liquid interface shifted downstream with the input power, and near the critical heat flux condition the interface was located at the channel outlet. Thus, the added heat resulted in increased quality of the two-phase flow rather than increasing the mixture temperature.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS)
EditorsA.L. Lee, J. Simon, K. Breuer, S. Chen, R.S. Keynton, A. Malshe, J.-I. Mou, M. Dunn
Pages567-573
Number of pages7
Volume3
StatePublished - 2001
Externally publishedYes
Event2001 ASME International Mechanical Engineering Congress and Exposition - New York, NY, United States
Duration: Nov 11 2001Nov 16 2001

Other

Other2001 ASME International Mechanical Engineering Congress and Exposition
CountryUnited States
CityNew York, NY
Period11/11/0111/16/01

Fingerprint

Heat sinks
Microchannels
Two phase flow
Boiling liquids
Vapors
Silicon wafers
Liquids
Bubble formation
Latent heat
Micromachining
Bubbles (in fluids)
Temperature
Heat flux
Visualization
Glass
Fluids
Water

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lee, M., Wong, Y. Y., Wong, M., & Zohar, Y. (2001). Two-phase flow boiling in a microchannel heat sink. In A. L. Lee, J. Simon, K. Breuer, S. Chen, R. S. Keynton, A. Malshe, J-I. Mou, ... M. Dunn (Eds.), American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS) (Vol. 3, pp. 567-573)

Two-phase flow boiling in a microchannel heat sink. / Lee, Man; Wong, Yiu Yan; Wong, Man; Zohar, Yitshak.

American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS). ed. / A.L. Lee; J. Simon; K. Breuer; S. Chen; R.S. Keynton; A. Malshe; J.-I. Mou; M. Dunn. Vol. 3 2001. p. 567-573.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lee, M, Wong, YY, Wong, M & Zohar, Y 2001, Two-phase flow boiling in a microchannel heat sink. in AL Lee, J Simon, K Breuer, S Chen, RS Keynton, A Malshe, J-I Mou & M Dunn (eds), American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS). vol. 3, pp. 567-573, 2001 ASME International Mechanical Engineering Congress and Exposition, New York, NY, United States, 11/11/01.
Lee M, Wong YY, Wong M, Zohar Y. Two-phase flow boiling in a microchannel heat sink. In Lee AL, Simon J, Breuer K, Chen S, Keynton RS, Malshe A, Mou J-I, Dunn M, editors, American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS). Vol. 3. 2001. p. 567-573
Lee, Man ; Wong, Yiu Yan ; Wong, Man ; Zohar, Yitshak. / Two-phase flow boiling in a microchannel heat sink. American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS). editor / A.L. Lee ; J. Simon ; K. Breuer ; S. Chen ; R.S. Keynton ; A. Malshe ; J.-I. Mou ; M. Dunn. Vol. 3 2001. pp. 567-573
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