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Turbulent flow and heat transfer in a square-sectioned U-bend

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Author

Summary, in English

Turbulent flow and heat transfer in a square-sectioned U-bend are investigated. Turbulence models with linear and non-linear expressions for the Reynolds stresses are used. The near wall turbulence is treated by the damping functions approach and a two-layer model with Wolfshtein's sub-layer treatment. The inlet conditions have a significant effect on the predictions. The results from the non-linear low-Reynolds number k-epsilon models including Suga's cubic low-Re model were closest to experimental data. These models predicted the stress-induced secondary motion in the straight inlet duct well. This secondary motion had a small impact on the flow in the bend.

Department/s

Publishing year

2006

Language

English

Pages

89-100

Publication/Series

Progress in Computational Fluid Dynamics, An International Journal

Volume

6

Issue

1-3

Document type

Journal article

Publisher

Inderscience Publishers

Topic

  • Energy Engineering

Keywords

  • secondary
  • flow
  • turbulence models
  • computation
  • curved duct
  • heat transfer

Status

Published

ISBN/ISSN/Other

  • ISSN: 1741-5233