摩擦速度が小さいときのK-εモデルの漸近解

概要

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An asymptotic near-wall solution of the k-ε and its extended-type turbulence models is investigated in the region with negligible wall stress. The solution is given in the form of the expansion concerning the distance from the wall in the limit of an infinite Reynolds number. This solution can explain experimental facts, for example, the half-power law for the mean velocity distribution, which is the counterpart of the logarithmic velocity distribution in the case of a constant stress layer and is very useful as a wall law in the numerical simulation of those models at high Reynolds numbers. At this time, the model constants in the half-power law and the turbulent kinetic energy are estimated from the experimental data in the region with small wall stress.
一般社団法人日本機械学会の論文
1990-12-25