乱流促進体をもつ二次元チャンネル内の乱流予測に関する研究 : 第1報、Large Eddy Simulation による数値予測

概要

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Fully developed incompressible turbulent flow in two-dimensional channel has been simulated numerically. Turbulence promoters were arranged periodically on one side of channel walls. Two walls and promoters were heated individually. The large-scale flow field and temperature field have been calculated by integrating the filtered, three-dimensional time-dependent Navier-Stokes equations and time-dependent energy equation. Motions of the turbulence field with small scales were simulated through eddy-viscosity models. The Reynolds and Peclet numbers were set at 1.1×10^4 and 7.7×10^3, respectively. Only 9,000 grid points were distributed and three kinds of averaging were used in order to complement the grid points. Mean-velocity profiles, turbulence statistics, time-dependent features of flow and mean-temperature profiles were obtained. The wall temperature profiles are in good agreement with the experimental data. Calculations were carried out on the HITAC M 200/280 H system computer of University of Tokyo.
一般社団法人日本機械学会の論文
1984-01-28