In this paper, large-eddy simulations (LES) of engine type flow are performed using commercially available computer code CONVERGE. First, accuracy of the numerical discretization scheme of the code is assessed using well established laminar flow configurations. Then, two different subgrid scale (SGS) models, an eddy-viscosity model of Vreman (Physics of fluids, 16, 2004) and a non eddy-viscosity model of Pomraning and Rutland (AIAA Journal, 40, 2002) are employed to predict turbulent flow characteristics in a piston-valve assembly. A number of grid resolutions are employed to perform the simulations, with and without the SGS models. The mean velocity and the root-mean-squared (RMS) values of the velocity fluctuations are compared with available experimental data. Although satisfactory comparison of model predictions with measured data is obtained, it is found that the predictions are more influenced by the grid resolution than the SGS model contribution.

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