CFD SIMULATION OF NONLINEAR DEEP-WATER WAVE INSTABILITIES INVOLVING WAVE BREAKING

被引:0
作者
Li, Yuzhu [1 ]
Fuhrman, David R. [1 ]
机构
[1] Tech Univ Denmark, Sect Fluid Mech Coastal & Maritime Engn, Dept Mech Engn, Lyngby, Denmark
来源
PROCEEDINGS OF ASME 2021 40TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING (OMAE2021), VOL 6 | 2021年
关键词
EVOLUTION;
D O I
暂无
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Extreme waves at the sea surface can have severe impacts on marine structures. One of the theoretical mechanisms leading to extreme waves is the instability of deep-water wave trains subject to initially small perturbations, which then grow exponentially. The present study focuses on the two-dimensional Benjamin-Feir (or modulational) instability and the three-dimensional crescent (or horseshoe) waves, also known as Class I and Class II instabilities, respectively. Numerical studies on Class I and Class II wave instabilities to date have been limited to models founded on potential flow theory, thus they could only properly investigate the process from initial growth of the perturbations to the initial breaking point. The present study conducts numerical simulations to investigate the generation and development of wave instabilities involving the wave breaking process. A CFD model solving Reynolds-averaged Navier-Stokes (RANS) equations coupled with turbulence closure in terms of the anisotropic Reynolds stress model is applied. Wave form evolutions, Fourier amplitudes, and the turbulence beneath the broken waves are investigated.
引用
收藏
页数:10
相关论文
共 15 条
[1]   DISINTEGRATION OF WAVE TRAINS ON DEEP WATER .1. THEORY [J].
BENJAMIN, TB ;
FEIR, JE .
JOURNAL OF FLUID MECHANICS, 1967, 27 :417-&
[2]   THE NUMERICAL-SOLUTION OF STEADY WATER-WAVE PROBLEMS [J].
FENTON, JD .
COMPUTERS & GEOSCIENCES, 1988, 14 (03) :357-368
[3]   Instability of the realizable k-ε turbulence model beneath surface waves [J].
Fuhrman, David R. ;
Li, Yuzhu .
PHYSICS OF FLUIDS, 2020, 32 (11)
[4]   A numerical study of crescent waves [J].
Fuhrman, DR ;
Madsen, PA ;
Bingham, HB .
JOURNAL OF FLUID MECHANICS, 2004, 513 :309-341
[5]   A wave generation toolbox for the open-source CFD library: OpenFoam® [J].
Jacobsen, Niels G. ;
Fuhrman, David R. ;
Fredsoe, Jorgen .
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 2012, 70 (09) :1073-1088
[6]   On the over-production of turbulence beneath surface waves in Reynolds-averaged Navier-Stokes models [J].
Larsen, Bjarke Eltard ;
Fuhrman, David R. .
JOURNAL OF FLUID MECHANICS, 2018, 853 :419-460
[7]  
Li Y., 2020, VIRTUAL INT C COASTA
[8]   A new Boussinesq method for fully nonlinear waves from shallow to deep water [J].
Madsen, PA ;
Bingham, HB ;
Liu, H .
JOURNAL OF FLUID MECHANICS, 2002, 462 :1-30
[9]   INSTABILITIES OF FINITE-AMPLITUDE WATER-WAVES [J].
MCLEAN, JW .
JOURNAL OF FLUID MECHANICS, 1982, 114 (JAN) :315-330
[10]   THE INSTABILITY AND BREAKING OF DEEP-WATER WAVES [J].
MELVILLE, WK .
JOURNAL OF FLUID MECHANICS, 1982, 115 (FEB) :165-185