Large eddy simulation of boundary layer flow under cnoidal waves

doi:10.1007/s10409-015-0486-6

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	Large eddy simulation of boundary layer flow under cnoidal waves
	Li YJ(李银军); Chen JB; Zhou JF(周济福); Zhang Q; Zhou, JF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
发表期刊	ACTA MECHANICA SINICA
	2016
卷号	32 期号:1 页码:22-37
ISSN	0567-7718
摘要	Water waves in coastal areas are generally nonlinear, exhibiting asymmetric velocity profiles with different amplitudes of crest and trough. The behaviors of the boundary layer under asymmetric waves are of great significance for sediment transport in natural circumstances. While previous studies have mainly focused on linear or symmetric waves, asymmetric wave-induced flows remain unclear, particularly in the flow regime with high Reynolds numbers. Taking cnoidal wave as a typical example of asymmetric waves, we propose to use an infinite immersed plate oscillating cnoidally in its own plane in quiescent water to simulate asymmetric wave boundary layer. A large eddy simulation approach with Smagorinsky subgrid model is adopted to investigate the flow characteristics of the boundary layer. It is verified that the model well reproduces experimental and theoretical results. Then a series of numerical experiments are carried out to study the boundary layer beneath cnoidal waves from laminar to fully developed turbulent regimes at high Reynolds numbers, larger than ever studied before. Results of velocity profile, wall shear stress, friction coefficient, phase lead between velocity and wall shear stress, and the boundary layer thickness are obtained. The dependencies of these boundary layer properties on the asymmetric degree and Reynolds number are discussed in detail.
关键词	Boundary Layer Structure Turbulence Large Eddy Simulation Cnoidal Wave
DOI	10.1007/s10409-015-0486-6
URL	查看原文
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000371242000003
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
项目资助者	We very much appreciate the financial support to this work from the National Natural Science Foundation of China (Grants 11172307 and 11232012) and 973 Program (2014CB046200).
CSCD记录号	CSCD:5660705
课题组名称	LMFS水环境流体力学(LEM)
论文分区	二类
力学所作者排名	True
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录] 被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/58746
专题	流固耦合系统力学重点实验室
通讯作者	Zhou, JF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Li YJ,Chen JB,Zhou JF,et al. Large eddy simulation of boundary layer flow under cnoidal waves[J]. ACTA MECHANICA SINICA,2016,32,1,:22-37.
APA	李银军,Chen JB,周济福,Zhang Q,&Zhou, JF .(2016).Large eddy simulation of boundary layer flow under cnoidal waves.ACTA MECHANICA SINICA,32(1),22-37.
MLA	李银军,et al."Large eddy simulation of boundary layer flow under cnoidal waves".ACTA MECHANICA SINICA 32.1(2016):22-37.

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