0

Full Content is available to subscribers

Subscribe/Learn More  >

Flow Boiling Heat Transfer in Microchannel Heat Sinks of Different Flow Orientations

[+] Author Affiliations
H. Y. Zhang, D. Pinjala

Institute of Microelectronics, Singapore

Paper No. IPACK2005-73041, pp. 51-58; 8 pages
doi:10.1115/IPACK2005-73041
From:
  • ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference
  • Advances in Electronic Packaging, Parts A, B, and C
  • San Francisco, California, USA, July 17–22, 2005
  • Conference Sponsors: Heat Transfer Division and Electronic and Photonic Packaging Division
  • ISBN: 0-7918-4200-2 | eISBN: 0-7918-3762-9
  • Copyright © 2005 by ASME

abstract

A study of FC-72 flow boiling in a microchannel heat sink with different orientations is presented. The heat sink consisted of 21 microchannels in parallel, with the channel dimensions of 0.2mm (W) × 2mm (H) × 15mm (L). The heat sink was attached onto a flip chip BGA package with a thermal grease at the interface to minimize the contact resistance. The experiments were conducted based on a subcooling around 31 °C and inlet thermodynamic equilibrium quality x = −0.4 with varying flowrates and power inputs for both the vertical upflow (VU) and the vertical downflow (VD) orientations. Boiling with bubbles was observed at the heat sink outlet even if the exit quality x<0. It was found that the flow boiling regime can be represented by isolated bubble flow, slug flow in the present microchannels. Both the junction to inlet thermal resistances and pressure drops are presented as functions of the power input. The experimentally determined thermal resistances were also compared with an analytical analysis in the presence of both single phase convection and two phase saturated boiling heat transfer mechanisms. Good agreement is achieved at large power inputs.   This paper was also originally published as part of the Proceedings of the ASME 2005 Heat Transfer Summer Conference.

Copyright © 2005 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In