タイトル(掲載誌)独立行政法人航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory SP-59
一般注記Direct numerical simulations of the forced two-dimensional turbulence are performed by lattice Boltzmann method with high resolutions. It is confirmed that the lattice Boltzmann method is an alternative approach to simulate multi-scales flows efficiently before instability takes place. The instability can occur even after millions time-steps of iteration. Based on the database of the DNS, the behaviors of energy and enstrophy flux and the features of SGS Lamb vector in context of large eddy simulation are discussed. The most important observation is that the transverse component of the SGS Lamb vector, which plays a key role in the dynamics, only dominates in the regions of curved sheet-like structures.
資料番号: NALSP0059005
レポート番号: NAL SP-59
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース(IRDB)(機関リポジトリ)
提供元機関・データベース宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ