Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis
文献类型：期刊论文
| 作者 | Geng, CH; He GW(何国威) ; Wang, YS; Xu, CX; Lozano-Duran, A; Wallace, JM
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| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2015-02 |
| 卷号 | 27期号:2页码:25111 |
| ISSN号 | 1070-6631 |
| 产权排序 | [Geng, Chenhui; He, Guowei; Wang, Yinshan; Xu, Chunxiao; Lozano-Duran, Adrian; Wallace, James M.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Geng, CH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| 中文摘要 | Direct numerical simulations of turbulent channel flow at Re-tau = 205 and 932 have been carried out to examine Taylor's "frozen turbulence" hypothesis. The terms in Taylor's hypothesis appear in the transport equation for instantaneous momentum (Navier-Stokes) in this flow. The additional terms, i.e., the additional convective acceleration term and the pressure gradient and viscous force terms, act to diminish the validity of Taylor's hypothesis when they are relatively large compared to the Taylor's hypothesis terms and are not in balance. A similar analysis has been applied to the transport equation for instantaneous vorticity. The additional terms in this equation, namely, the additional convective rates of change of vorticity terms, the stretching/compression/rotation of vorticity terms, and the viscous diffusion of vorticity terms, similarly act to diminish the validity of Taylor's hypothesis when they are relatively large compared to the terms in the hypothesis and are not in balance. Where in the channel flow this diminishment occurs, and to what degree, and which of the non-Taylor's hypothesis terms in the momentum and vorticity equations contribute most to this diminishment are unraveled here. (C) 2015 AIP Publishing LLC. |
| 学科主题 | Mechanics; Physics, Fluids & Plasmas |
| 分类号 | 一类/力学重要期刊 |
| 类目[WOS] | Mechanics ; Physics, Fluids & Plasmas |
| 研究领域[WOS] | Mechanics ; Physics |
| 关键词[WOS] | NAVIER-STOKES EQUATIONS ; CONVECTION VELOCITIES ; ISOTROPIC TURBULENCE ; REYNOLDS-NUMBER ; SHEAR FLOWS ; WALL FLOWS ; STATISTICS ; APPROXIMATION ; APPLICABILITY ; ACCELERATIONS |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1063/1.4908070 |
| 语种 | 英语 |
| WOS记录号 | WOS:000350551300037 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/49912]  |
| 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 | Geng, CH,He GW,Wang, YS,et al. Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis[J]. PHYSICS OF FLUIDS,2015,27(2):25111. |
| APA | Geng, CH,何国威,Wang, YS,Xu, CX,Lozano-Duran, A,&Wallace, JM.(2015).Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis.PHYSICS OF FLUIDS,27(2),25111. |
| MLA | Geng, CH,et al."Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis".PHYSICS OF FLUIDS 27.2(2015):25111. |
入库方式： OAI收割
来源：力学研究所
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