書誌事項
- タイトル別名
-
- J0570302 Large-Eddy Simulation of box turbulence and unstable periodic motion
抄録
We have discovered an unstable periodic solution to the incompressible filtered Navier-Stokes equation for box turbulence driven by the steady external body force. We have obtained the periodic motion by using a Newton-Krylov-hookstep method with a global convergence property. The energy transfer event can be described by the vortex dynamics in the periodic motion at moderate Reynolds number. There are three distinct temporal phases. First, a large amount of energy is injected to the largest scale due to the external forcing; the four largest-scale vortices become vigorous. Secondly, the vortices create strain fields between them; in those fields the smaller-scale vortices are created. In the last phase, most of energy is transferred to the sub-grid scale; vortices at all the scales becomes quiescent. After the quiescence period, the largest-scale vortices start getting vigorous back to the first phase.
収録刊行物
-
- 年次大会
-
年次大会 2014 (0), _J0570302--_J0570302-, 2014
一般社団法人 日本機械学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282680820201344
-
- NII論文ID
- 110009943960
-
- ISSN
- 24242667
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可