Subgrid-scale helicity equation model for large-eddy simulation of turbulent flows

doi:10.1063/5.0038165

	Subgrid-scale helicity equation model for large-eddy simulation of turbulent flows
	Qi H(齐涵)1,2; Li XL(李新亮)1,2 ; Yu ZP(于长平)1
通讯作者	Yu, Changping(cpyu@imech.ac.cn)
发表期刊	PHYSICS OF FLUIDS
	2021-03-01
卷号	33 期号:3 页码:13
ISSN	1070-6631
摘要	A new one-equation eddy-viscosity model based on subgrid-scale (SGS) helicity is introduced in this paper for large-eddy simulation (LES) of turbulent flows. First, the governing equation of SGS helicity is deduced from the incompressible Navier-Stokes equations, and it reflects the transfer of the small-scale helicity that has been filtered out. We deduce a certain functional relation between the eddy viscosity and SGS helicity based on the kinetic energy and helicity spectra in the homogeneous and isotropic helical turbulence. For improving the accuracy, each unclosed term in the governing equation of SGS helicity is modeled independently, and the coefficients of these unclosed terms are constants or are determined dynamically. The new one-equation eddy-viscosity model is first tested and validated in the simulation of the homogeneous and isotropic helical turbulence. The a priori tests from the direct numerical simulation of forced homogeneous and isotropic turbulence show that the energy and helicity fluxes exhibit scale invariance in the inertial subrange. Additionally, the a posteriori tests demonstrate that the constant-coefficient and dynamic SGS helicity equation models can predict both the energy and helicity spectra more precisely than the common SGS models. For the LES of channel flow, the SGS helicity equation model can accurately predict the mean velocity, the turbulent stress, and the viscous shear stress and supply more abundant flow structures than the compared SGS model under the same grid resolution.
DOI	10.1063/5.0038165
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000629011300007
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	National Key Research and Development Program of China[2020YFA0711800] ; National Key Research and Development Program of China[2019YFA0405300] ; National Key Research and Development Program of China[2016YFA0401200] ; NSFC[91852203] ; NSFC[12072349] ; National Numerical Windtunnel Project ; Science Challenge Project[TZ2016001] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDC01000000]
项目资助者	National Key Research and Development Program of China ; NSFC ; National Numerical Windtunnel Project ; Science Challenge Project ; Strategic Priority Research Program of Chinese Academy of Sciences
论文分区	一类/力学重要期刊
力学所作者排名	1
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/86330
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LHD, 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	Qi H,Li XL,Yu ZP. Subgrid-scale helicity equation model for large-eddy simulation of turbulent flows[J]. PHYSICS OF FLUIDS,2021,33,3,:13.
APA	齐涵,李新亮,&于长平.(2021).Subgrid-scale helicity equation model for large-eddy simulation of turbulent flows.PHYSICS OF FLUIDS,33(3),13.
MLA	齐涵,et al."Subgrid-scale helicity equation model for large-eddy simulation of turbulent flows".PHYSICS OF FLUIDS 33.3(2021):13.

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
Jp2021151.pdf（3630KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载