A Note On The Numerical Simulations Of Flow Past A Wavy Square-Section Cylinder
文献类型：期刊论文
| 作者 | Ling GC(凌国灿) ; Lin LM(林黎明)
|
| 刊名 | Acta Mechanica Sinica
 |
| 出版日期 | 2008 |
| 页码 | 101-105 |
| 通讯作者邮箱 | linggc@imech.ac.cn |
| 关键词 | Numerical Simulation Geometric Disturbance Square-Section Cylinder Wake Flow Bluff-Body Vortex Wake |
| ISSN号 | 0567-7718 |
| 通讯作者 | Ling, GC (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China. |
| 中文摘要 | The flow past a square-section cylinder with a geometric disturbance is investigated by numerical simulations. The extra terms, due to the introduction of mapping transformation simulating the effect of disturbance into the transformed Navier-Stokes equations, are correctly derived, and the incorrect ones in the previous literature are pointed out and analyzed. Furthermore, the relationship between the vorticity, especially on the cylinder surface, and the disturbance is derived and explained theoretically. The computations are performed at two Reynolds numbers of 100 and 180 and three amplitudes of waviness of 0.006, 0.025 and 0.167 with another aim to explore the effects of different Reynolds numbers and disturbance on the vortex dynamics in the wake and forces on the body. Numerical results have shown that, at the mild waviness of 0.025, the Karman vortex shedding is suppressed completely for Re = 100, while the forced vortex dislocation is appeared in the near wake at the Reynolds number of 180. The drag reduction is up to 21.6% at Re = 100 and 25.7% at Re = 180 for the high waviness of 0.167 compared with the non-wavy cylinder. The lift and the Strouhal number varied with different Reynolds numbers and the wave steepness are also obtained. |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | BLUFF-BODY ; VORTEX ; WAKE |
| 收录类别 | SCI ; EI ; CSCD |
| 语种 | 英语 |
| WOS记录号 | WOS:000252613700010 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26152]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Ling GC,Lin LM. A Note On The Numerical Simulations Of Flow Past A Wavy Square-Section Cylinder[J]. Acta Mechanica Sinica,2008:101-105. |
| APA | 凌国灿,&林黎明.(2008).A Note On The Numerical Simulations Of Flow Past A Wavy Square-Section Cylinder.Acta Mechanica Sinica,101-105. |
| MLA | 凌国灿,et al."A Note On The Numerical Simulations Of Flow Past A Wavy Square-Section Cylinder".Acta Mechanica Sinica (2008):101-105. |
入库方式： OAI收割
来源：力学研究所
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