ESTIMATION OF TURBULENCE MODELS BY LARGE EDDY SIMULATION WITH HIGH-RESOLUTION GRIDS

Turbulent flow in a two-dimensional channel is numerically simulated by the large eddy simulation (LES) technique. A finite difference scheme with about 3.83 million grid points is applied to the case of the Reynolds number 5 840. Turbulence statistics are compared with the experimental data and the results of recent large-scale computations; agreements are quite reasonable. Numerical results are stored as a database for the purpose of studying the turbulence structure and the modeling in the near-wall region. As the first report in a series on this research, this paper presents the balance of the terms in the transport equations of the turbulence kinetic energy, the dissipation rate and the Reynolds stress tensor.