円柱まわりの流れの三次元数値シミュレーション : 第1報, 時間・空間相関の解析〔流体工学, 流体機械〕

概要

論文の詳細を見る
Three dimensional flow field around a circular cylinder was analyzed by using a third-order upwind finite-difference method for Reynolds number=1000. Lift and drag force spectrum have some peaks near main karman frequency. It was also found that streamwise velocity and pressure spectrum around separation point have some peaks with a difference mode of these peaks (beat mode). Spanwise flow structure is formed by such modes that have nearly half frequency of Karman mode (half mode) and which are created by three-dimensional vortices. In the present analysis, three dimensional vortices induce half modes and a beat mode additional to Karman mode, resulting in the observation of complex three dimensional flow field.
一般社団法人日本機械学会の論文
1997-10-25