Instability in centrifugally stable shear flows
文献类型：期刊论文
| 作者 | Deguchi, Kengo2; Dong, Ming1 |
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2025-03-05 |
| 卷号 | 1006页码:27 |
| 关键词 | high-speed flow Taylor-Couette flow critical layers |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2025.114 |
| 通讯作者 | Deguchi, Kengo(kengo.deguchi@monash.edu) ; Dong, Ming(dongming@imech.ac.cn) |
| 英文摘要 | We investigate the linear instability of flows that are stable according to Rayleigh's criterion for rotating fluids. Using Taylor-Couette flow as a primary test case, we develop large-Reynolds-number-matched asymptotic expansion theories. Our theoretical results not only aid in detecting instabilities previously reported by Deguchi (Phys. Rev. E, vol 95, 2017, p. 021102(R)) across a wide parameter range, but also clarify the physical mechanisms behind this counterintuitive phenomenon. Instability arises from the interaction between large-scale inviscid vortices and the viscous flow structure near the wall, which is analogous to Tollmien-Schlichting waves. Furthermore, our asymptotic theories and numerical computations reveal that similar instability mechanisms occur in boundary layer flows over convex walls. |
| WOS关键词 | VISCOUS-LIQUID ; GORTLER VORTICES ; COUETTE-FLOW ; STABILITY ; GROWTH ; WAVES |
| 资助项目 | Australian Research Council[DP230102188] ; National Natural Science Foundation of China[92371104] ; National Natural Science Foundation of China[11988102] ; CAS project for Young Scientists in Basic Research[YSBR-087] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620102] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001436925600001 |
| 资助机构 | Australian Research Council ; National Natural Science Foundation of China ; CAS project for Young Scientists in Basic Research ; Strategic Priority Research Program of Chinese Academy of Sciences |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/100214]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Deguchi, Kengo; Dong, Ming |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Monash Univ, Sch Math, Clayton, Vic 3800, Australia |
| 推荐引用方式 GB/T 7714 | Deguchi, Kengo,Dong, Ming. Instability in centrifugally stable shear flows[J]. JOURNAL OF FLUID MECHANICS,2025,1006:27. |
| APA | Deguchi, Kengo,&Dong, Ming.(2025).Instability in centrifugally stable shear flows.JOURNAL OF FLUID MECHANICS,1006,27. |
| MLA | Deguchi, Kengo,et al."Instability in centrifugally stable shear flows".JOURNAL OF FLUID MECHANICS 1006(2025):27. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。