Experimental evaluation of the k-ε turbulence model in numerical simulation of in-cylinder air motion
by Y. Moriyoshi, H. Kobayashi, T. Kamimoto
International Journal of Vehicle Design (IJVD), Vol. 10, No. 5, 1989

Abstract: In a previous report, it was revealed that the k-ε turbulence model, which assumes an isotropic eddy viscosity, was not appropriate for the prediction of an anisotropic in-cylinder flow field. In this article, the k-ε turbulence model is modified so as to be applicable to the anisotropic in-cylinder flow, using a flux Richardson number which represents the effect of anisotropy of turbulence on turbulent diffusivity. A comparison between the prediction and the experimental data, obtained by an LDV system using a transparent cylinder engine, shows that the modified k-ε turbulence model allows successful prediction of the mean flow field but little improvement regarding the turbulence field.

Online publication date: Mon, 26-May-2014

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