Evolution of flow structures and the dynamics of helicity under the effects of Coriolis force in inhomogeneous rotating turbulence
文献类型：期刊论文
| 作者 | Gan RY(甘润园)1,2; Hu RN(胡润宁)1,2; Li XL(李新亮)1,2; Yu ZP(于长平)1,2 |
| 刊名 | PHYSICAL REVIEW FLUIDS
 |
| 出版日期 | 2025-07-14 |
| 卷号 | 10期号:7页码:25 |
| ISSN号 | 2469-990X |
| DOI | 10.1103/kqwb-wh3v |
| 通讯作者 | Li, Xinliang(lixl@imech.ac.cn) ; Yu, Changping(cpyu@imech.ac.cn) |
| 英文摘要 | Inhomogeneous rotating turbulence is ubiquitous in nature and engineering. However, people are still unfamiliar with the dual cascade of energy and helicity in inhomogeneous rotating turbulence. In this paper, our aim is to study the effects of the inhomogeneous Coriolis force on the evolution of flow structures and the dynamics of helicity. On this issue, we performed direct numerical simulation (DNS) on several cases of the simplified inhomogeneous rotational turbulence with cosine distribution of angular velocity. The DNS results demonstrate the spectra of energy and helicity and the interscale transfer of energy and helicity. The Biot-Savart law exhibits the influences of the Coriolis force. In conclusion, the flow field under the effects of the inhomogeneous Coriolis force can be categorized into three regions, namely, the helicity-dominated region, the dual cascade region, and the rotation-dominated region. The energy cascades downscale through the average transfer effect, while the helicity cascades downscale relying on extreme events. In addition, the decomposition of the Coriolis force shows that the Coriolis force accounts for the formation of dumbbell-shaped columnar structures and the generation of helicity. |
| 分类号 | 二类 |
| WOS关键词 | WAVE TURBULENCE ; ENERGY ; TORNADO ; SPECTRA |
| 资助项目 | National Key Research and Development Program of China[2020YFA0711800] ; National Natural Science Foundation of China[12472229] ; National Natural Science Foundation of China[12232018] ; National Natural Science Foundation of China[12202457] ; National Natural Science Foundation of China[12072349] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001533541900003 |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| 其他责任者 | 李新亮，于长平 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102107]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gan RY,Hu RN,Li XL,et al. Evolution of flow structures and the dynamics of helicity under the effects of Coriolis force in inhomogeneous rotating turbulence[J]. PHYSICAL REVIEW FLUIDS,2025,10(7):25. |
| APA | 甘润园,胡润宁,李新亮,&于长平.(2025).Evolution of flow structures and the dynamics of helicity under the effects of Coriolis force in inhomogeneous rotating turbulence.PHYSICAL REVIEW FLUIDS,10(7),25. |
| MLA | 甘润园,et al."Evolution of flow structures and the dynamics of helicity under the effects of Coriolis force in inhomogeneous rotating turbulence".PHYSICAL REVIEW FLUIDS 10.7(2025):25. |
入库方式： OAI收割
来源：力学研究所
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