Developing turbulent heat transfer in a 360°bend of square cross section

Kun Ho Chun, Young Don Choi, Jong Keun Shin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper reports the computational results on the developing turbulent heat transfer in a 360° bend of square cross section. The centrifugal force acting on the fluid in a bend flow induces strong cross-stream motion. It was found from the computations that the counterrotating vortex pair caused by the centrifugal force are broken into a multicell pattern after the θ = 90° station of the bend and the continuous arising and ceasing of the vortices directly affects the variation of heat transfer through the walls of the bend. Particular attention was paid to the developing process of the vortices because they exert the most significant effects on the convective heat transfer through the bend walls. A low Reynolds number second moment turbulence closure was employed to simulate the near wall turbulence behaviors of the bend.

Original languageEnglish
Pages (from-to)77-88
Number of pages12
JournalHeat Transfer - Asian Research
Volume28
Issue number2
DOIs
Publication statusPublished - 1999

Keywords

  • Curved duct flow
  • Gortler vortices
  • Square duct

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

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