Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows | |
Yang BW(杨博文)1,2; Jin GD(晋国栋)1,2; Wu T(吴霆)1; Yang ZX(杨子轩)1,2; He GW(何国威)1,2 | |
发表期刊 | ACTA MECHANICA SINICA |
2020-07-25 | |
页码 | 14 |
ISSN | 0567-7718 |
摘要 | Resolvent operator has been increasingly used to investigate turbulent flows and develop control strategies. Recently, Towne et al. (J Fluid Mech 883:A17, 2020) proposed a resolvent-based estimation (RBE) method for predicting turbulent statistics in a channel flow. In this paper, we utilize the RBE method to predict the root-mean-square (RMS) and space-time energy spectra of streamwise velocity fluctuation, where the input is the space-time energy spectra at a reference horizontal plane located in the logarithmic layer and the output is the space-time energy spectra in the buffer layer. The explicit formulas for the RBE method are given in detail for numerical implementation. The results show the capability of the RBE method in the prediction of the convection velocity and bandwidth of the space-time energy spectra. Furthermore, we make a systematic evaluation of the performance of the RBE method by varying the input configurations, including the wall-normal location of the reference plane, the inclusion or exclusion of the pressure as an input variable, the implementation approach of the pressure boundary condition, and the choice of the window function. It is found that the results of both RMS velocity and space-time energy spectra obtained from the RBE method are sensitive to the location of the reference plane. However, the pressure boundary conditions and inclusion of pressure as an input do not cause significant change in the RMS velocity and space-time energy spectra. Although it does not influence the prediction of the RMS velocity, a window function is found crucial in the RBE method for the prediction of the space-time energy spectra. Graphic abstract |
关键词 | Space-time energy spectra Turbulent channel flow Resolvent operator |
DOI | 10.1007/s10409-020-00970-3 |
收录类别 | SCI ; EI ; CSCD |
语种 | 英语 |
WOS记录号 | WOS:000552170000002 |
关键词[WOS] | PREDICTIVE MODEL ; WAVE ; AMPLIFICATION ; SIMULATION ; FLUCTUATIONS ; VORTICES ; WIND |
WOS研究方向 | Engineering ; Mechanics |
WOS类目 | Engineering, Mechanical ; Mechanics |
项目资助者 | National Natural Science Foundation of China[11988102] ; Strategic Priority Research Program[XDB22040104] |
论文分区 | 二类 |
力学所作者排名 | 1 |
RpAuthor | Yang, Zixuan |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/84743 |
专题 | 非线性力学国家重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Yang BW,Jin GD,Wu T,et al. Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows[J]. ACTA MECHANICA SINICA,2020:14. |
APA | Yang BW,Jin GD,Wu T,Yang ZX,&He GW.(2020).Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows.ACTA MECHANICA SINICA,14. |
MLA | Yang BW,et al."Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows".ACTA MECHANICA SINICA (2020):14. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Jp2020187.pdf(1691KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
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。
修改评论