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.
Investigation of a Two-Equation Turbulent Heat Transfer Model Applied to Ducts
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division December 27, 2001; revision received September 25, 2002. Associate Editor: K. S. Ball.
Rokni and , M., and Sunde´n , B. (January 29, 2003). "Investigation of a Two-Equation Turbulent Heat Transfer Model Applied to Ducts ." ASME. J. Heat Transfer. February 2003; 125(1): 194–200. https://doi.org/10.1115/1.1532017
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