Numerical flow and experimental heat transfer of rectangular channel with rhombus PIN-FINS

S. W. Chang, T. H. Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This study experimentally investigates the pressure drop coefficients (f) and the detailed Nusselt numbers (Nu) distributions over the endwall of a rectangular channel fitted with rhombus pin-fin array with the aid of numerical turbulent flow structures predicted by STAR-CD CFD code. A set of numerical flow results and heat transfer data with detailed Nu distributions, along with the f coefficients measured at isothermal conditions, were selected to illustrate the mechanisms of heattransfer and pressure-drop augmentations attributed to the rhombus pin-fin array arranged in staggered manner. Local and area-averaged Nusselt numbers (Nu and Nu), f coefficients and thermal performance factors (TPF) between two rectangular channels enhanced by circular and rhombus pin-fins in the Reynolds number (Re) range of 5000≤Re≤15000 are subsequently compared to reveal the competitive advantages of rhombus pin-fin array for cooling applications. Empirical Nu and f correlations for the test channel with rhombus pin-fins are generated to assist relevant design activities.

Original languageEnglish
Pages (from-to)55-66
Number of pages12
JournalJournal of Taiwan Society of Naval Architects and Marine Engineers
Issue number2
Publication statusPublished - 2013 May

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Mechanical Engineering


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