HKUST Library Institutional Repository Banner

HKUST Institutional Repository >
Mechanical Engineering >
MECH Conference Papers >

Please use this identifier to cite or link to this item:
Title: Two-phase flow oscillations in microchannel convective boiling
Authors: Lee, Man
Lee, Yi-Kuen
Zohar, Yitshak
Keywords: Two-phase flows
Convective boiling
Issue Date: Jan-2007
Citation: Proceedings of the 20th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2007), Kobe, Japan, 21-25 January, 2007, p. 635-638.
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 un-steady 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.
Rights: © 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Appears in Collections:MECH Conference Papers

Files in This Item:

File Description SizeFormat
twophase1.pdf920KbAdobe PDFView/Open

All items in this Repository are protected by copyright, with all rights reserved.