DIRECT NUMERICAL SIMULATION OF NEAR-WALL TURBULENCE IN PLANE CHANNEL IN A WIDE RANGE OF REYNOLDS NUMBERS
D. G. Asfandiyarov, S. A. Finogenov, V. M. Goloviznin
VANT. Ser.: Mat. Mod. Fiz. Proc 2016. Вып.2. С. 48-58.
The paper presents direct numerical simulation results for the near-wall turbulence in a plane channel obtained using computational grids of 4 x 106 to 34 x 106 cells for Reynolds numbers 5 600, 13 750, 21 900. Simulations were carried out using the modified CABARET scheme. The choice of geometrical sizes for the computational domain and computational grids is justified based on the analysis of correlation dependences and spectral characteristics of flow. The simulation results were used to obtain standard parameters of the turbulent flow in plane channel, namely, the averaged velocity profile, components of turbulent stress tensor, contributions from the molecular and turbulent components of viscosity tensor, and the channel resistance coefficient. It is shown that they are in a good agreement with the data calculated for a similar problem using the pseudo-spectral scheme. All simulations were carried out on supercomputer "Lomonosov". Keywords: direct numerical simulation, scheme CABARET, turbulent flow in plane channel, viscous incompressible fluid.
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