クエット・ポアズイユ型乱流のスケール則と1/2乗則および乱流コア領域の考察(流体工学,流体機械)

概要

論文の詳細を見る
Direct numerical simulations of fully developed Couette-Poiseuille type turbulent flow are performed. The velocity law of this flow depends on the Reynolds number and two non-dimensional parameters of the shear stress gradient. We pay a particular attention to the effect of the shear stress gradient on the velocity distribution on the Couette-type flow. Computational results are dependent on the three non-dimensional parameters and are compared with theoretical laws and existing experimental data. The law of the mean velocity profile for Couette-Poiseuille type turbulent flow is considered in the regions characterized by 1/2-power law and velocity defect law. In particular, it is shown that the influence of turbulent diffusion from the opposite wall appears in the flow with large shear stress gradient and 1/2-power law is restricted to narrow region.
社団法人日本機械学会の論文
2002-04-25