Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows

doi:10.1007/s10409-020-00970-3

	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)2; Yang ZX(杨子轩)1,2; He GW(何国威)1,2
刊名	ACTA MECHANICA SINICA
	2020-07-25
页码	14
关键词	Space-time energy spectra Turbulent channel flow Resolvent operator
ISSN号	0567-7718
DOI	10.1007/s10409-020-00970-3
英文摘要	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
分类号	二类
WOS关键词	PREDICTIVE MODEL ; WAVE ; AMPLIFICATION ; SIMULATION ; FLUCTUATIONS ; VORTICES ; WIND
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000552170000002
资助机构	National Natural Science Foundation of China[11988102] ; Strategic Priority Research Program[XDB22040104]
其他责任者	Yang, Zixuan
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/84743]
专题	力学研究所_国家微重力实验室
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	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	杨博文,晋国栋,吴霆,杨子轩,&何国威.(2020).Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows.ACTA MECHANICA SINICA,14.
MLA	杨博文,et al."Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows".ACTA MECHANICA SINICA (2020):14.