Augmented heat transfer with intersecting rib in rectangular channels having different aspect ratios

Heeyoon Chung, Jun Su Park, Sehjin Park, Seok Min Choi, Dong Ho Rhee, Hyung Hee Cho

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Abstract This study was an experimental investigation of the effect of an intersecting rib on heat/mass transfer performance in rectangular channels with angled ribs and different aspect ratios. In a rib-roughened channel with angled ribs, heat/mass transfer performance deteriorates as the channel aspect ratio increases, since the vortices induced by angled ribs diminish with increasing aspect ratio. A longitudinal rib that bisects the angled ribs is suggested to overcome this disadvantage. The heat transfer performance of angled rib configurations with a 60° attack angle were tested with and without an intersecting rib using naphthalene sublimation method. The channel aspect ratio is varied from 1 to 4. When the intersecting rib was present, additional vortices were generated at every point of intersection with the angled ribs. Thus the heat/mass transfer performance was significantly enhanced for all channel aspect ratios when an intersecting rib was added to an ordinary angled rib configuration.

Original languageEnglish
Article number11928
Pages (from-to)357-367
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Publication statusPublished - 2015 Sep 1

Bibliographical note

Funding Information:
This work was supported by the aerospace research program (KA00157) of Korea Aerospace Research Institute (KARI) and the human resources development program (No. 20144030200560) of the Korean Institute of Energy Technology Evaluation and Planning (KETEP). Those programs are funded by the Korean government Ministry of Trade, Industry and Energy.

Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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