Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence

doi:10.1007/s10546-022-00760-3

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	Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence
	Li SL(李世隆)3,4; Zhou ZD(周志登)3,4; Chen DY(陈丹阳)3,4; Yuan,Xianxu 1,2; Guo,Qilong 1,2; Yang XL(杨晓雷)3,4
刊名	BOUNDARY-LAYER METEOROLOGY
	2022-12-04
页码	32
关键词	Roughness-resolved simulation Direct numerical simulation Cube-roughened surfaces Roughness length
ISSN号	0006-8314
DOI	10.1007/s10546-022-00760-3
通讯作者	Yang, Xiaolei(xyang@imech.ac.cn)
英文摘要	In this work, we carried out roughness-resolved direct numerical simulations of cube-roughened turbulent channel flows to investigate the effects of aligned and staggered arrangements, element spacings, and element orientations on the statistics of rough-wall turbulence. The results show that the equivalent sandgrain roughness, Reynolds stresses and dispersive stresses are affected by element spacings and arrangements in different ways depending on the cube orientations. Placing the roughness elements in a staggered way in general increases the equivalent sandgrain roughness, unless when the element-element interaction is insignificant for the cube orientation with wakes of short length. As for the Reynolds normal stresses and the streamwise component of the dispersive stresses (both are normalized by the total friction velocity), placing the cube elements in a staggered way decreases their maximal values when compared with the aligned arrangements. As for the effects of element spacing on the equivalent sandgrain roughness and the maximums of the Reynolds normal stresses, similar trends are observed for different element orientations and arrangements when increasing the element spacing l/r (where r is the cube height) from 2.0 to 2.8. When further increasing the element spacing l/r from 2.8 to 3.5, however, different trends are observed for different element orientations. As for the dispersive stresses, greater maximal values of their streamwise components are observed for larger element spacing for all the considered cube-roughened surfaces. For the turbulence statistics in the wake of the cube element, certain similarities are observed for different element spacings.
分类号	Q3
资助项目	National Numerical Wind Tunnel project[NNW2021ZT1-B34] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Natural Science Foundation of China[12172360] ; Institute of Mechanics CAS ; Chinese Academy of Sciences
WOS关键词	DIRECT NUMERICAL-SIMULATION ; LARGE-EDDY SIMULATION ; BOUNDARY-LAYER ; ROUGHNESS SUBLAYER ; SURFACE-ROUGHNESS ; MEAN FLOW ; CHANNEL ; ARRAYS ; DRAG
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000893892600001
资助机构	National Numerical Wind Tunnel project ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China ; Institute of Mechanics CAS ; Chinese Academy of Sciences
其他责任者	Yang, Xiaolei
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91323]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.State Key Lab Aerodynam, Mianyang, Peoples R China 2.China Aerodynam Res & Dev Ctr, Computat Aerodynam Inst, Mianyang, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China; 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China;
推荐引用方式 GB/T 7714	Li SL,Zhou ZD,Chen DY,et al. Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence[J]. BOUNDARY-LAYER METEOROLOGY,2022:32.
APA	李世隆,周志登,陈丹阳,Yuan,Xianxu,Guo,Qilong,&杨晓雷.(2022).Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence.BOUNDARY-LAYER METEOROLOGY,32.
MLA	李世隆,et al."Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence".BOUNDARY-LAYER METEOROLOGY (2022):32.