Effect of cannelure fin configuration on compact aircooling heat sink

Chi-Chuan Wang*, Kai Shing Yang, Yang Ping Liu, Ing Youn Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The present study proposed a novel cannelure fin structure applicable to compact air-cooled heat sink under cross flow condition. A total of eight heat sinks were made and tested, including plain fin, oblique dimple type (I), oblique dimple type (II), straight cannelure, full oblique cannelure, half oblique cannelure with dimple/cavity type, half oblique cannelure with dimple/cavity type (II), and full oblique cannelure with dimple/cavity. Test results indicate that the proposed full cannelure fin along with the dimple/cavity structure can attain approximately 25% increase of heat transfer performance, and accompanies a friction reduction of about 20%. Moreover, converse to those interrupted fin or triangular vortex generator, it is found that the proposed fin structure still offers significant augmentation in fully developed region. The observed IR image of the temperature measurement of the test fin configurations also confirms the measurements.

Original languageEnglish
Pages (from-to)1640-1647
Number of pages8
JournalApplied Thermal Engineering
Issue number10
StatePublished - 1 Jul 2011


  • Cannelure
  • Dimple/cavity vortex generator
  • Heat sink
  • Interrupted fin

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