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The Dynamic Pressure Response of Phase Eruption in Micro Channels

[+] Author Affiliations
Brenda E. Haendler, Dorian Liepmann, Albert P. Pisano

University of California at Berkeley, Berkeley, CA

Paper No. HT-FED2004-56595, pp. 521-527; 7 pages
doi:10.1115/HT-FED2004-56595
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 4
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4693-8 | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

New results are presented in this paper quantifying the dynamic pressure response that is produced as a result of the phase eruption phenomenon in micro channels at a flow rate of 0.5 ml/min. The experimentally measured time-varying pressure change from phase eruption is profiled for water and conclusions are drawn which will help guide the design and operation of an intake manifold for a micro engine. Employing the method of discrete Fourier transform, the amplitude and frequency of the pressure response is characterized for a variety of flow conditions detailing the sensitivity of the system to external changes. Relationships are established between the temperature and Reynolds number of the flow and the pressure in the channel for non-boiling flows. The governing equations for flow in micro channels are presented and conclusions on modeling phase change are discussed. The single-phase relationships discussed are deviated from once phase eruption begins and future modeling directions are proposed.

Copyright © 2004 by ASME

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