| Turbulent momentum and kinetic energy transfer of channel flow over three-dimensional wavy walls | |
Zhang EW(张恩伟)1 ; Wang Z(王展)1; Liu, Qingquan2
| |
| Corresponding Author | Liu, Qingquan(liuqq@bit.edu.cn) |
| Source Publication | PHYSICAL REVIEW FLUIDS
 |
| 2024-03-08 | |
| Volume | 9Issue:2Pages:29 |
| ISSN | 2469-990X |
| Abstract | In this paper, we conduct a numerical investigation to analyze the turbulent flow characteristics over three-dimensional wavy walls with varying amplitudes and wavelengths, with a specific focus on the transfer of momentum and kinetic energy. Detailed three-directional momentum statistics are presented to elucidate the influence of shape parameters on flow behavior. The temporal-spatial averaging at relative height is employed to highlight the impact of the wall on mean, time-averaged, and dispersive momentum flux as well as kinetic energy production. Our findings indicate that the current wall amplifies the effects of spanwise momentum flux, which is determined by the transverse flow around the crest. The dispersive shear stress (DSS) demonstrates a notable correlation with vorticity enhancement, while the near-wall vertical momentum flux is jointly governed by the counteraction of Reynolds shear stress and DSS. Through an analysis of kinetic energy conservation, we observe the transfer of kinetic energy among time-averaged, mean, dispersive, and turbulent motions. Overall, kinetic energy is transferred from dispersion to the mean flow and subsequently to turbulence downstream of the crest. On the windward side, both turbulent and dispersive energy are injected into the mean flow, suggesting the possible growth of internal boundary layer. Additionally, the exchange between dispersion and turbulence significantly contributes to turbulent kinetic energy production, particularly in cases with high amplitudes or spanwise wavelengths. |
| DOI | 10.1103/PhysRevFluids.9.034602 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001187586000001 |
| WOS Keyword | LARGE-EDDY SIMULATION ; NUMERICAL-SIMULATION ; QUADRANT ANALYSIS ; BED-TURBULENCE ; BARCHAN DUNES ; STEADY ; SLOPE ; MODEL ; RIVER |
| WOS Research Area | Physics |
| WOS Subject | Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China[12032005] ; National Natural Science Foundation of China[12302515] ; National Natural Science Foundation of China[12325207] ; National Key R&D Program of China[2021YFA0719200] |
| Funding Organization | National Natural Science Foundation of China ; National Key R&D Program of China |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Liu, Qingquan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94775 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang EW,Wang Z,Liu, Qingquan. Turbulent momentum and kinetic energy transfer of channel flow over three-dimensional wavy walls[J]. PHYSICAL REVIEW FLUIDS,2024,9,2,:29. |
| APA | 张恩伟,王展,&Liu, Qingquan.(2024).Turbulent momentum and kinetic energy transfer of channel flow over three-dimensional wavy walls.PHYSICAL REVIEW FLUIDS,9(2),29. |
| MLA | 张恩伟,et al."Turbulent momentum and kinetic energy transfer of channel flow over three-dimensional wavy walls".PHYSICAL REVIEW FLUIDS 9.2(2024):29. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment