Recent progress in the development of the Elliptic Blending Reynolds-stress model |
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Institution: | 1. DISMI, Univeristà di Modena e Reggio Emilia, 42122 Reggio Emilia, Italy;2. DIEF, Università di Modena e Reggio Emilia, 41125 Modena, Italy;1. Department of Research, Nagoya Industrial Science Research Institute, Yotsuya-dori 1-13, Chikusa-ku, Nagoya 464-0819, Japan;2. Information and Analysis Technologies Division/Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan;1. School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester M13 9PL, UK;2. Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia |
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Abstract: | The Elliptic Blending Reynolds Stress Model (EB-RSM), originally proposed by Manceau and Hanjali? (2002) to extend standard, weakly inhomogeneous Reynolds stress models to the near-wall region, has been subject to various modifications by several authors during the last decade, mainly for numerical robustness reasons. The present work revisits all these modifications from the theoretical standpoint and investigates in detail their influence on the reproduction of the physical mechanisms at the origin of the influence of the wall on turbulence. The analysis exploits recent DNS databases for high-Reynolds number channel flows, spanwise rotating channel flows with strong rotation rates, up to complete laminarization, and the separated flow after a sudden expansion without and with system rotation. Theoretical arguments and comparison with DNS results lead to the selection of a recommended formulation for the EB-RSM model. This formulation shows satisfactory predictions for the configurations described above, in particular as regards the modification of the mean flow and turbulent anisotropy on the anticyclonic or pressure side. |
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Keywords: | Turbulence modelling Second-moment closure Near-wall turbulence Rotating flows |
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