Flow boiling oscillations in microchannel heat sinks

R. Muwanga, Ibrahim Hassan

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

4 Citations (Scopus)

Abstract

The following presents flow boiling oscillation characteristics in two silicon Microchannel heat sink configurations aimed at micro/nano- spacecraft thermal management. One is a conventional heat sink with 45 parallel channels, whereas the second is similar except with cross-links at 3 locations along the channels. Data are presented over a flow range of 20 to 0 ml/min using distilled water as the working fluid. The heat sinks have a footprint area of 3.5 cm 2 and contain 269 μm wide by 283 μm deep DRIE channels. Flow boiling oscillations are found to be similar in characteristic trends between the two configurations, showing a decreasing frequency with increasing heat flux. The oscillation amplitudes are relatively large, but identical in frequency and phase between the inlet and outlet temperature, inlet pressure and pressure drop. Data for the standard heat sink at two different inlet temperatures and various flow rate, show an increasing frequency trend with decreasing inlet temperature, whereas an increasing frequency with increasing flow rate. Although limited data is presented on the cross-linked configuration, this work presents a first glimpse of their characteristics under two-phase flow conditions.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings
Pages1482-1492
Number of pages11
Volume3
Publication statusPublished - 2006
Externally publishedYes
Event9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings - San Francisco, CA, United States
Duration: 5 Jun 20068 Jun 2006

Other

Other9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings
CountryUnited States
CitySan Francisco, CA
Period5/6/068/6/06

Fingerprint

Heat sinks
Microchannels
Boiling liquids
Flow rate
Two phase flow
Temperature
Pressure drop
Spacecraft
Heat flux
Silicon
Fluids
Water

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Muwanga, R., & Hassan, I. (2006). Flow boiling oscillations in microchannel heat sinks. In Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings (Vol. 3, pp. 1482-1492)

Flow boiling oscillations in microchannel heat sinks. / Muwanga, R.; Hassan, Ibrahim.

Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. Vol. 3 2006. p. 1482-1492.

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

Muwanga, R & Hassan, I 2006, Flow boiling oscillations in microchannel heat sinks. in Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. vol. 3, pp. 1482-1492, 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings, San Francisco, CA, United States, 5/6/06.
Muwanga R, Hassan I. Flow boiling oscillations in microchannel heat sinks. In Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. Vol. 3. 2006. p. 1482-1492
Muwanga, R. ; Hassan, Ibrahim. / Flow boiling oscillations in microchannel heat sinks. Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings. Vol. 3 2006. pp. 1482-1492
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