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Title: Large eddy simulation of boundary layer flow under cnoidal waves
Author: Li YJ(李银军); Chen JB; Zhou JF(周济福); Zhang Q
Source: ACTA MECHANICA SINICA
Issued Date: 2016
Volume: 32, Issue:1, Pages:22-37
Abstract: 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.
Keyword: Boundary layer structure ; Turbulence ; Large eddy simulation ; Cnoidal wave
Language: 英语
Indexed Type: SCI ; EI ; CSCD
Corresponding Author: Zhou, JF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Correspondent Email: zhoujf@imech.ac.cn
DOI: 10.1007/s10409-015-0486-6
Related URLs: 查看原文
DOC Type: 期刊论文
WOS Subject: Engineering, Mechanical ; Mechanics
WOS Subject Extended: Engineering ; Mechanics
WOS ID: WOS:000371242000003
ISSN: 0567-7718
Funder: 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).
Rank: [Li, Yin-Jun; Chen, Jiang-Bo; Zhou, Ji-Fu] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; [Zhang, Qiang] Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China
CSCD ID: 5660705
Department: LMFS水环境流体力学(LEM)
Classification: 二类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/58746
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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Recommended Citation:
Li YJ,ChenJB,Zhou JF,et al. Large eddy simulation of boundary layer flow under cnoidal waves[J]. Acta Mechanica Sinica,2016,32(1):22-37.
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