Shape optimisation problem for stability of Navier–Stokes flow field
説明
This paper presents the numerical results of a shape optimisation problem with regard to delaying the transition of a Navier–Stokes flow field from laminar to turbulent by using the theory developed by Nakazawa and Azegami. The theory was reviewed within the framework of functional analysis and updated with another expression of the shape derivative with respect to the objective function. A computer program was developed with the FreeFEM++. Numerical analyses were performed for two types of problems: a two-dimensional Poiseuille flow field with a sudden expansion and a two-dimensional uniform flow field around an isolated body. From the first example, two local minimum points of symmetric and asymmetric flow fields were determined, and the asymmetric flow field was found to be more stable. With regard to the second example, we reached the local minimum point of an elliptical shape, and infrequently determined a solution converging to an elliptical shape with the bluff in the leeward direction. By comparison, the superiority of the elliptical shape was obvious.
収録刊行物
-
- International Journal of Computational Fluid Dynamics
-
International Journal of Computational Fluid Dynamics 32 (2-3), 68-87, 2018-08-01
Taylor & Francis
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1050282813790554624
-
- NII論文ID
- 120006554475
-
- ISSN
- 10290257
- 10618562
-
- HANDLE
- 2237/00029252
-
- 本文言語コード
- en
-
- 資料種別
- journal article
-
- データソース種別
-
- IRDB
- Crossref
- CiNii Articles
- KAKEN