Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients
文献类型：期刊论文
| 作者 | Yang PF(杨鹏飞) ; Zhou ZD(周志登); Xu H; He GW(何国威); He GW(何国威)
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| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2023-01-25 |
| 卷号 | 955页码:14 |
| 关键词 | homogeneous turbulence turbulence theory |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2022.1072 |
| 通讯作者 | He, G. W.(hgw@lnm.imech.ac.cn) |
| 英文摘要 | A relation among invariants of filtered velocity gradients with two different filter sizes is derived. Based on this relation and physical reasoning, it is shown analytically that strain self-amplification contributes more to energy transfer than vortex stretching in homogeneous turbulence, as observed in recent numerical investigations of homogeneous isotropic turbulence. We note that the invariant relation studied and hence the inequality between strain self-amplification and vortex stretching apply to all homogeneous flows, not restricted to isotropic turbulence. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | LOCAL ENERGY FLUX ; REYNOLDS-NUMBER ; TURBULENT ; GEOMETRY ; TENSOR ; VORTICITY ; DYNAMICS ; MODELS |
| 资助项目 | Natural Science Foundation of China (NSFC) Basic Science Center Program for 'Multiscale Problems in Nonlinear Mechanics'[11988102] ; NSFC[91852104] ; NSFC[12202452] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001091249400001 |
| 资助机构 | Natural Science Foundation of China (NSFC) Basic Science Center Program for 'Multiscale Problems in Nonlinear Mechanics' ; NSFC |
| 其他责任者 | He, G. W. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/93346]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | He GW(何国威) |
| 推荐引用方式 GB/T 7714 | Yang PF,Zhou ZD,Xu H,et al. Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients[J]. JOURNAL OF FLUID MECHANICS,2023,955:14. |
| APA | 杨鹏飞,周志登,Xu H,何国威,&He GW.(2023).Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients.JOURNAL OF FLUID MECHANICS,955,14. |
| MLA | 杨鹏飞,et al."Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients".JOURNAL OF FLUID MECHANICS 955(2023):14. |
入库方式： OAI收割
来源：力学研究所
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