Numerical investigation of turbulent heat transfer in a rectangular-sectioned 90 degrees bend

Sassan Etemad, Bengt Sundén

Research output: Contribution to journalArticlepeer-review

14 Citations (SciVal)

Abstract

The flow and thermal fields in a rectangular-sectioned 90 degrees bend with a cross-section aspect ratio of 6 were investigated using four turbulence models. All models managed to reproduce the general flow and thermal patterns. Chen's high-Re k-epsilon model and Suga's cubic low-Re k-epsilon model performed well. The V2F k-epsilon model was found to be the least diffusive model and delivered good results. The RSM-GGDH model showed convergence difficulties and gave poor results. It was found that the boundary-layer thickness and the flow upstream of the bend are crucial for the character of the secondary flow, velocity profile, turbulence level, and heat transfer in the bend.
Original languageEnglish
Pages (from-to)323-343
JournalNumerical Heat Transfer Part A: Applications
Volume49
Issue number4
DOIs
Publication statusPublished - 2006

Subject classification (UKÄ)

  • Energy Engineering

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