The effects of cross links on adiabatic two-phase flow characteristics in scaled microchannel heat sinks

Minh N. Dang, Ibrahim Hassan

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

1 Citation (Scopus)

Abstract

The effects of cross-links, introduced in the channel core of an array of parallel scaled microchannels, were investigated by comparison of the flow distribution in six different multi-channel configurations. A standard straight channel test section and five other test sections, which incorporated cross-links were used. One case includes two cross-links located at 1/3 and 2/3's of the channel length, with their width varied by one, two and three times the channel width. Whereas, four and six cross-links were used for the other case. All test sections had 45 parallel rectangular channels, with a hydraulic diameter of 1.59 mm, and were fabricated from clear acrylic to enhance flow visualization. The flow distribution was monitored at four select channels. The working mixture was air and water with superficial velocities ranging from 0.03 to 9.93 m/s, and 0.04 to 0.83 m/s, respectively. This corresponds to an observed range of flow quality between 0 and 0.25, whereby the mass flux range is from 42 kg/m2s to 834 kg/m2s. The cross-linked designs permit fluid communication between channels, and the results showed that there is a significant impact on flow distribution when compared to the straight channel design. This is due to flow sharing between neighboring channels. Flow patterns were presented in terms of fractional time function, and provided further insight to flow characteristics. Comparing with a single channel flow regime map, the expected intermittent flow regime was observed 84% to 90 % of the time for the cross-linked designs, whereas 65% to 80% of that for the straight channel design.

Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007
Pages915-922
Number of pages8
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007 - Puebla, Mexico
Duration: 18 Jun 200720 Jun 2007

Other

Other5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007
CountryMexico
CityPuebla
Period18/6/0720/6/07

Fingerprint

flow characteristics
heat sinks
Heat sinks
two phase flow
microchannels
Microchannels
Two phase flow
flow distribution
Channel flow
Flow visualization
Flow patterns
Acrylics
Mass transfer
Hydraulics
Fluids
Air
Water
time functions
flow visualization
channel flow

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)

Cite this

Dang, M. N., & Hassan, I. (2007). The effects of cross links on adiabatic two-phase flow characteristics in scaled microchannel heat sinks. In Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007 (pp. 915-922) https://doi.org/10.1115/ICNMM2007-30096

The effects of cross links on adiabatic two-phase flow characteristics in scaled microchannel heat sinks. / Dang, Minh N.; Hassan, Ibrahim.

Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007. 2007. p. 915-922.

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

Dang, MN & Hassan, I 2007, The effects of cross links on adiabatic two-phase flow characteristics in scaled microchannel heat sinks. in Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007. pp. 915-922, 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007, Puebla, Mexico, 18/6/07. https://doi.org/10.1115/ICNMM2007-30096
Dang MN, Hassan I. The effects of cross links on adiabatic two-phase flow characteristics in scaled microchannel heat sinks. In Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007. 2007. p. 915-922 https://doi.org/10.1115/ICNMM2007-30096
Dang, Minh N. ; Hassan, Ibrahim. / The effects of cross links on adiabatic two-phase flow characteristics in scaled microchannel heat sinks. Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007. 2007. pp. 915-922
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