Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence | |
Li SL(李世隆)1,2; Zhou ZD(周志登)1,2![]() ![]() | |
Source Publication | BOUNDARY-LAYER METEOROLOGY
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2023-02 | |
Volume | 186Issue:2Pages:305-336 |
ISSN | 0006-8314 |
Abstract | 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. |
Keyword | Roughness-resolved simulation Direct numerical simulation Cube-roughened surfaces Roughness length |
DOI | 10.1007/s10546-022-00760-3 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000893892600001 |
WOS Keyword | DIRECT NUMERICAL-SIMULATION ; LARGE-EDDY SIMULATION ; BOUNDARY-LAYER ; ROUGHNESS SUBLAYER ; SURFACE-ROUGHNESS ; MEAN FLOW ; CHANNEL ; ARRAYS ; DRAG |
WOS Research Area | Meteorology & Atmospheric Sciences |
WOS Subject | Meteorology & Atmospheric Sciences |
Funding Project | 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 |
Funding Organization | 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 |
Classification | Q3 |
Ranking | 1 |
Contributor | Yang, Xiaolei |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/91324 |
Collection | 非线性力学国家重点实验室 |
Corresponding Author | Yang XL(杨晓雷) |
Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China; 3.China Aerodynam Res & Dev Ctr, Computat Aerodynam Inst, Mianyang, Peoples R China; 4.State Key Lab Aerodynam, Mianyang, Peoples R China |
Recommended Citation 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,2023,186,2,:305-336. |
APA | Li SL,Zhou ZD,Chen DY,Yuan,Xianxu,Guo,Qilong,&Yang XL.(2023).Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence.BOUNDARY-LAYER METEOROLOGY,186(2),305-336. |
MLA | Li SL,et al."Effects of Wall Topology on Statistics of Cube-Roughened Wall Turbulence".BOUNDARY-LAYER METEOROLOGY 186.2(2023):305-336. |
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