Short-time evolution of Lagrangian velocity gradient correlations in isotropic turbulence
文献类型：期刊论文
| 作者 | Fang L ; Bos WJT; Jin GD(晋国栋)
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| 刊名 | Physics of Fluids
 |
| 出版日期 | 2015-12-09 |
| 卷号 | 27期号:12页码:125102 |
| 中文摘要 | We show by direct numerical simulation (DNS) that the Lagrangian cross correlation of velocity gradients in homogeneous isotropic turbulence increases at short times, whereas its auto-correlation decreases. Kinematic considerations allow to show that two invariants of the turbulent velocity field determine the short-time velocity gradient correlations. In order to get a more intuitive understanding of the dynamics for longer times, heuristic models are proposed involving the combined action of local shear and rotation. These models quantitatively reproduce the effects and disentangle the different physical mechanisms leading to the observations in the DNS. |
| 分类号 | 一类/力学重要期刊 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000367459300026 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/58215]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Fang L,Bos WJT,Jin GD. Short-time evolution of Lagrangian velocity gradient correlations in isotropic turbulence[J]. Physics of Fluids,2015,27(12):125102. |
| APA | Fang L,Bos WJT,&Jin GD.(2015).Short-time evolution of Lagrangian velocity gradient correlations in isotropic turbulence.Physics of Fluids,27(12),125102. |
| MLA | Fang L,et al."Short-time evolution of Lagrangian velocity gradient correlations in isotropic turbulence".Physics of Fluids 27.12(2015):125102. |
入库方式： OAI收割
来源：力学研究所
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