中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 力学研究所
  3. 中国科学院力学研究所
  4. 非线性力学国家重点实验室
Predictive capability of the logarithmic law for roughness-modeled large-eddy simulation of turbulent channel flows with rough walls

文献类型：期刊论文

作者Li, Shilong1,2; Yang, Xiaolei1,2; Lv, Yu1,2; Yang XL(杨晓雷)
刊名PHYSICS OF FLUIDS
出版日期2022-08-01
卷号34期号:8页码:17
ISSN号1070-6631
DOI10.1063/5.0098611
通讯作者Yang, Xiaolei(xyang@imech.ac.cn)
英文摘要Direct numerical simulation (DNS) and large-eddy simulation (LES) resolving roughness elements are computationally expensive. LES employing the logarithmic law as the wall model, without the need to resolve the flow at the roughness element scale, provides an efficient alternative for simulating turbulent flows over rough walls. In this work, we evaluate the predictive capability of the roughness-modeled LES by comparing its predictions with those from the roughness-resolved DNS for turbulent channel flows with rough walls. A good agreement is observed for the mean streamwise velocity. The Reynolds stresses predicted by the roughness-modeled LES also reasonably agree with the roughness-resolved predictions. Differences, on the other hand, are observed for the dispersive Reynolds stresses, integral scales, and spacetime correlations. The roughness-modeled LES fails to predict the dispersive stresses as one can expect. In the outer layer, the integral length scale predicted by the roughness-modeled LES is lower than the roughness-resolved prediction, which cannot be improved by refining the grid. As for the space-time correlations, discrepancies are shown for the streamwise velocity fluctuations, with a faster decay of the correlation in the outer layer observed in the roughness-modeled predictions. Examination of the space-time correlation using the elliptic approximation model shows that the roughness-modeled LES underpredicts the convection velocity in the near wall region while overpredicting the sweeping velocity in the outer layer with no improvements observed when refining the grid. Published under an exclusive license by AIP Publishing.
WOS关键词SPACE-TIME CORRELATIONS ; VISCOSITY
资助项目National Science Foundation of China Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Numerical Windtunnel Project[NNW2021ZT1-B34] ; National Natural Science Foundation of China[12172360] ; Strategic Priority Research Program, Chinese Academy of Sciences (CAS)[XDB22040104] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-SYS002] ; CAS Center for Excellence in Complex System Mechanics
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:000838450600011
资助机构National Science Foundation of China Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Numerical Windtunnel Project ; National Natural Science Foundation of China ; Strategic Priority Research Program, Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; CAS Center for Excellence in Complex System Mechanics
源URL[http://dspace.imech.ac.cn/handle/311007/89937]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Yang, Xiaolei
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Li, Shilong,Yang, Xiaolei,Lv, Yu,et al. Predictive capability of the logarithmic law for roughness-modeled large-eddy simulation of turbulent channel flows with rough walls[J]. PHYSICS OF FLUIDS,2022,34(8):17.
APA Li, Shilong,Yang, Xiaolei,Lv, Yu,&杨晓雷.(2022).Predictive capability of the logarithmic law for roughness-modeled large-eddy simulation of turbulent channel flows with rough walls.PHYSICS OF FLUIDS,34(8),17.
MLA Li, Shilong,et al."Predictive capability of the logarithmic law for roughness-modeled large-eddy simulation of turbulent channel flows with rough walls".PHYSICS OF FLUIDS 34.8(2022):17.

入库方式： OAI收割

来源：力学研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。