E323 クエット・ポアズイユ型乱流の DNS

概要

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Direct numerical simulations (DNS) of fully developed Couette-Poiseuille type turbulent flows are performed at a Reynolds number of 100,based on the wall friction velocity, with various mean pressure gradients The effects of mean pressure gradient on turbulence statistics of the wall turbulence are investigated using the DNS data. For the spatial discretization method fully conservative 8th-order accurate finite difference method (FDM) is used in the periodic directions. From the computational results, the additive constant of the logarithmic velocity law decreases with increasing the adverse pressure gradient. In the same time, the appearance of the 1/2-power law on the mean velocity profile is confirmed. The coefficient of the 1/2-power law coincides well with existing experimental data.
日本流体力学会の論文
2000-07-25