Thermal hydraulic characteristics of turbulent single-phase flow in an enhanced tube using louvered strip insert with various slant angles

Indri Yaningsih, Agung Tri Wijayanta, Takahiko Miyazaki, Shigeru Koyama

Research output: Contribution to journalArticle

7 Citations (Scopus)


Effect of slant angle (α) of louvered strip insert on single-phase forced convection heat transfer and friction factor of internal flow was investigated experimentally. The parameter of slant angles (α) 15° 20° and 25° was examined at the Reynolds number (Re) of 5300–17,500. The plain tube was also performed for comparison. The results show that the louvered strip insert provided the increases in heat transfer and friction factor up to 77.02% and 3.35 times above the plain tube. The results also indicate that heat transfer and friction factor increased with increasing slant angle. The highest slant angle yielded the highest thermal performance factor in the value of 1.12. Empirical correlations were also developed for Nusselt number and friction factor based on experimental data.

Original languageEnglish
Pages (from-to)355-362
Number of pages8
JournalInternational Journal of Thermal Sciences
Publication statusPublished - Dec 2018


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)

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