Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows
文献类型：期刊论文
| 作者 | Wu T(吴霆); He GW(何国威)
|
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2023-02-07 |
| 卷号 | 956页码:A31 |
| 关键词 | turbulence modelling turbulent boundary layers |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2023.39 |
| 英文摘要 | Composite sweeping enhanced resolvents, referred to as the R s(2) model, are proposed to predict the space time statistics of large scale structures in turbulent channel flows. This model incorporates two key mechanisms: (i) eddy damping is introduced to represent random sweeping decorrelation caused by nonlinear forcing, leading to a sweeping enhanced resolvent R s; and (ii) the sweeping enhanced resolvent R s is composited into its iterations R s(2) to yield non zero Taylor time microscales. The resulting R s(2) model can correctly predict the frequency spectra and two point cross spectra of large scale structures. This model is compared numerically with eddy viscosity enhanced resolvent models. The latter are designed to represent energy transfer instead for time decorrelation, and thus underpredict the characteristic decay time scales. The R s(2) model correctly yields the characteristic decay time scales in turbulent channel flows. |
| 分类号 | 一类/力学重要期刊 |
| WOS研究方向 | Mechanics ; Physics, Fluids & Plasmas |
| 语种 | 英语 |
| WOS记录号 | WOS:000927887700001 |
| 资助机构 | NSFC Basic Science Center Program for Multiscale Problems inNonlinear Mechanics' [11988102] ; National Natural Science Foundation of China [12002344, 11232011, 11572331] ; China PostdoctoralScience Foundation [2020M670478] ; Strategic Priority Research Program [XDB22040104] |
| 其他责任者 | He, GW (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; He, GW (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91811]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu T,He GW. Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows[J]. JOURNAL OF FLUID MECHANICS,2023,956:A31. |
| APA | 吴霆,&何国威.(2023).Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows.JOURNAL OF FLUID MECHANICS,956,A31. |
| MLA | 吴霆,et al."Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows".JOURNAL OF FLUID MECHANICS 956(2023):A31. |
入库方式： OAI收割
来源：力学研究所
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