Dynamic SmagorinskyモデルへのLagrangian型安定化手法の導入とその効果 : Dynamic LESによる2次元角柱周辺流れの解析(第3報)
1998 年 63 巻 511 号 p. 39-43
詳細
1998 年 63 巻 511 号 p. 39-43
The lagrangian dynamic subgrid-scale (SGS) model proposed by Meneveau et al. (1994) was implemented and tested for a turbulent flowfield past a 2D square cylinder at Re=2.2×104. This model improves the usual type of dynamic Smagorinsky model by minimizing the error of the algebraic identity along fluid trajectories. This is realized numerically by solving two simple relaxation transport equations. It was confirmed that this model contributes to improvement of calculation stability and provides more accurate results than does the usual type of dynamic Smagorinsky model.
