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REFINEMENT OF A SECOND MOMENT CLOSURE BY ELLIPTIC BLENDING MODEL AND ITS APPLICATION TO ROTATING TURBULENT CHANNEL FLOWS

Jong Keun Shin
Department of Automotive Engineering, Hanzhong University, 119, Jiheung-dong, Donghae, Kangwondo 240-713, Korea

Kun Ho Chun
Department of Mechanical Engineering, Korea University 1, 5-Ka, Anam-dong Sungbuk-ku, SeouI, 136-701, Korea

Young Don Choi
Department of Mechanical Engineering, Korea University, 1, Anam-dong, Sungbuk-ku, Seoul 136-701, Korea

Abstract

This paper describes further developments of a near-wall second moment turbulence closure of Manceau and Hanjalic(2002), and its application to the imposed system rotation. To refine the model, called "the elliptic blending model", an inhomogeneity correction is added to the near-wall redistribution term. Also, another approach to modelling the near-wall limiting redistribution is employed for the general complex geometries, which frequently appears in industrial applications. Concerning the homogeneous redistribution, the model of Speziale-Sarkar-Gatski(SSG) is replaced by a Launder-Tselepidakis non-linear model. The present refined model is tested by direct comparison with the DNS to validate the performance of predictions.