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

In English

Författare

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.

Avdelning/ar

Publiceringsår

2003

Språk

Engelska

Sidor

194-200

Publikation/Tidskrift/Serie

Journal of Heat Transfer

Volym

125

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

American Society Of Mechanical Engineers (ASME)

Ämne

  • Energy Engineering

Nyckelord

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

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0022-1481