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Investigation of a two-equation turbulent heat transfer model applied to ducts

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Author

Summary, in English

This investigation concerns numerical calculation of fully developed turbulent forced convective heat transfer and fluid flow in ducts over a wide range of Reynolds numbers. The low Reynolds number version of a non-linear eddy viscosity model is combined with a two-equation heat flux model with the eddy diffusivity concept. The model can theoretically be used for a range of Prandtl numbers or a range of at different fluids. The computed results compare satisfactory with the. available experiment. Based on existing DNS data and calculations in this work the ratio between the time-scales (temperature to velocity) is found to be approximately 0.7. In light of this assumption an algebraic scalar flux model with variable diffusivity is presented.

Department/s

Publishing year

2003

Language

English

Pages

194-200

Publication/Series

Journal of Heat Transfer

Volume

125

Issue

1

Document type

Journal article

Publisher

American Society Of Mechanical Engineers (ASME)

Topic

  • Energy Engineering

Keywords

  • turbulence
  • modeling
  • heat transfer
  • channel flow
  • convection

Status

Published

ISBN/ISSN/Other

  • ISSN: 0022-1481