A Modified Form of the k-e Model for Predicting Wall Turbulence 壁面湍流K-E模型的一种改进形式.pdf

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A Modified Form of the k-e Model for Predicting Wall Turbulence 壁面湍流K-E模型的一种改进形式.pdf

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A Modified Form of the k-e Model C. K. G.Lam Graduate Student . for Predicting Wall Turbulence K. Bremhorst The high Reynolds number form of the k-e model is extended and tested by ap- Reader. plication to fully developed pipe flow. It is established that the model is valid Department of Mechanical Engineering, throughout the fully turbulent, semilaminar and laminar regions of the flow. Unlike University of Queensland, St . Lucia, many previously proposed forms of the k-e model, the present form does not have Brisbane, Australia 4067 to be used in conjunction with empirical wall function formulas and does not in- clude additional terms in the k and e equations. Comparison between predicted and measured dissipation rate in the important wall region is also possible. 1 Introduction The k-e model of turbulence has recently emerged as a dUi dUj dU: powerful tool for prediction of many