Investigation of a Two-Equation Turbulent Heat Transfer Model Applied to Narrow Ducts

Masoud Rokni, Bengt Sundén

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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 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.
Keyword: turbulence; pipe flow; heat transfer; forced convection; viscosity
Original languageEnglish
JournalJournal of Heat Transfer
Volume125
Issue number1
Pages (from-to)194-200
ISSN0022-1481
DOIs
Publication statusPublished - 2003
Externally publishedYes

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