波状流路内乱流の直接シミュレーション : 第1報, 流れ場の巨視的な特徴

概要

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A direct numerical simulation (DNS) of a turbulent flow in a wavy channel was carried out with consistent finite-difference method of high-order accuracy. The application of the database generated by the DNS is suited not only for study of the structure of turbulent flow but also for the design and testing of turbulence models in more practical fields. The wavy channel causes periodic pressure gradient, successively acceleration and deceleration of streamwise velocity, and separating region. The scale of separating region depends on the amplitude of wavy wall. Some characteristics of the flow are shown, for example the momentum distribution. It is also demonstrated that the flow is characterized by the simple linear approximation
一般社団法人日本機械学会の論文
1998-07-25