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.
Issue Section:
Technical Notes
Keywords:
turbulence,
pipe flow,
heat transfer,
forced convection,
viscosity,
Channel Flow,
Convection,
Heat Transfer,
Modeling,
Turbulence
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.Copyright © 2003
by ASME
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