1305 計測融合シミュレーションによる正方形管路内乱流の再現に関する数値実験 : フィードバックの影響領域の考察に基づくフィードバック点数の低減について(2)(OS13-2 計測とシミュレーションの融合,OS13 計測とシミュレーションの融合,オーガナイズドセッション)

概要

論文の詳細を見る
A measurement-integrated simulation (MI simulation) is a SIMPLER-based flow simulation scheme modified by adding a feedback signal proportional to the difference between the simulation and the real flow. MI simulation has been in practical use, however, a general theory of MI simulation has not been established. In this study, numerical experiment was performed for MI simulation of turbulent flow in a square duct to obtain fundamental knowledge in constructing a general theory. MI simulation applying feedback at one grid point revealed that the effect of feedback propagates sharply in the downstream direction. As a result, MI simulation applying feedback at the grid points on every twentieth plane in the x_1 direction still reduces the error by a factor on the order of 10^<-4> at some feedback gain, while MI simulation with the feedback on the planes skipped in the x_2 direction requires ten times more planes to achieve the same reduction rate.
一般社団法人日本機械学会の論文
2006-10-28