Two-phase flow oscillations in microchannel convective boiling

Man Lee, Yi Kuen Lee, Yitshak Zohar

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

1 Scopus citations

Abstract

A thermal microsystem with integrated heaters, pressure and temperature microsensors, has been fabricated to study local temperature and pressure fluctuations occurring in forced convective boiling in microchannels. The observed two-phase flows can be classified into two patterns: oscillating liquid/vapour interface and liquid burst flow; both leading to unsteady temperature and pressure fields. FFT power spectra of the measured signals are correlated with flow visualizations to analyse the two-phase flow modes. The dominant fluctuation frequency of each flow mode increases with input power; and, under similar conditions, the frequency of the periodically oscillating liquid/vapour interface is higher than the dominant frequency of the liquid bursts. Dimensional analysis is performed to derive empirical correlations for the dimensionless fluctuation frequency, Strouhal number, for both flow patterns.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
Pages635-638
Number of pages4
Publication statusPublished - 2007
Event20th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2007 - Kobe, Japan
Duration: Jan 21 2007Jan 25 2007

Other

Other20th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2007
CountryJapan
CityKobe
Period1/21/071/25/07

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ASJC Scopus subject areas

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

Cite this

Lee, M., Lee, Y. K., & Zohar, Y. (2007). Two-phase flow oscillations in microchannel convective boiling. In Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) (pp. 635-638). [4433164]