応力収支レベルにおける応力方程式モデルの検討

概要

論文の詳細を見る
The Reynolds-stress budgets in channel flow are calculated using a second-moment closure that was previously validated in various turbulent flows. The results are compared with direct simulation (DNS) data. The redistribution model is considered to correspond to the velocity pressure-gradient term Π_<ij>, in view of the fact that there exists a spit of Π_<ij> which yields a redistributive term close to Π_<ij> itself. The comparison shows that, in general, the redistribution model behaves properly, indicating a reason for the high capability of the present model. However, the model produces a suppressed turbulent diffusion and an exaggerated dissipation as compared to those of the DNS data. When the redistribution is split into the rapid term and the slow term, the individual model is unsatisfactory; in this respect, the present model should be improved for wider applicability.
一般社団法人日本機械学会の論文
1992-12-25