Turbulent momentum and kinetic energy transfer of channel flow over three-dimensional wavy walls

doi:10.1103/PhysRevFluids.9.034602

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Turbulent momentum and kinetic energy transfer of channel flow over three-dimensional wavy walls
	Zhang EW(张恩伟)2; Wang Z(王展)2; Liu, Qingquan 1
刊名	PHYSICAL REVIEW FLUIDS
	2024-03-08
卷号	9 期号:2 页码:29
ISSN号	2469-990X
DOI	10.1103/PhysRevFluids.9.034602
通讯作者	Liu, Qingquan(liuqq@bit.edu.cn)
英文摘要	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.
分类号	二类
资助项目	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]
WOS关键词	LARGE-EDDY SIMULATION ; NUMERICAL-SIMULATION ; QUADRANT ANALYSIS ; BED-TURBULENCE ; BARCHAN DUNES ; STEADY ; SLOPE ; MODEL ; RIVER
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:001187586000001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
其他责任者	Liu, Qingquan
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94774]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 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.