対向壁に粗面を有する正方形断面管内乱流の数値解析

概要

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A numerical analysis has been performed on fully developed turbulent flow in a square duct with two roughened facing walls using an algebraic stress model. The calculated results where compared with the experimental date and other published numerical results. In a smooth duct, as is well known, a pair of vortices is observed in a quadrant of the duct cross section. In this rough duct, however, both the present method and the experiment indicated formation of only one vortex in a quadrant. Moreover, the present method can predict more accurately the location of the center of secondary flow than other numerical methods. The calculated results of the distributions of normal stresses and turbulent energy are in reasonably good agreement with the experimental data. However, the different sign region of the shear stress, which is generated by the secondary flow of the second kind, is not shown in the present calculated results.
一般社団法人日本機械学会の論文
1993-05-25