発達チャネル乱流の乱れ特性に及ぼすレイノルズ数の効果

概要

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Effect of the Reynolds number on turbulent characteristics is studied, using the data reported so far for fully developed turbulent channel flows. The data show that the turbulent intensity and the Reynolds stress distributions normalized by the friction velocity depend on the Reynolds number Re* if Re* is not too high. If Re* exceeds a given value, the distributions approach asymtotic curves within the wall region. This means that there exists the law of the wall for turbulent quantities. The conditions under which the law holds differ for the mean velocity and the turbulent quantities. Regime diagrams of turbulence are presented, which clearly indicate the Reynolds number dependence of turbulent quantities. The Re* dependence is considered in relation to the turbulent velocity scale, inactive motion and the wall-blocking effect.
一般社団法人日本機械学会の論文
1993-08-25