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Simulation of Turbulent Flow in a Square Duct with Nonlinear k-$\varepsilon$ Models  

Myong Hyon Kook (국민대 기계자동차공학부)
Publication Information
Journal of computational fluids engineering / v.8, no.2, 2003 , pp. 57-63 More about this Journal
Abstract
Two nonlinear κ-ε models with the wall function method are applied to the fully developed turbulent flow in a square duct. Typical predicted quantities such as axial and secondary velocities, turbulent kinetic energy and Reynolds stresses are compared in details both qualitatively and quantitatively with each other. A nonlinear κ-ε model with the wall function method capable of predicting accurately duct flows involving turbulence-driven secondary motion is presented in the present paper. The nonlinear κ-ε model of Shih et al.[1] adopted in a commercial code is found to be unable to predict accurately duct flows with the prediction level of secondary flows one order less than that of the experiment.
Keywords
Nonlinear κ-ε model; Turbulence-driven secondary flow; Anisotropy; Simulation;
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