Influences of free surface jump conditions and different k - ω SST turbulence models on breaking wave modelling

被引：43

作者：

Liu, Shengnan ^{[1
]}

Ong, Muk Chen ^{[1
]}

Obhrai, Charlotte ^{[1
]}

Gatin, Inno ^{[2
]}

Vukcevic, Vuko ^{[2
]}

机构：

[1] Univ Stavanger, Dept Mech & Struct Engn & Mat Sci, Stavanger, Norway

[2] Univ Zagreb, Fac Mech Engn & Naval Architecture, Zagreb, Croatia

来源：

OCEAN ENGINEERING | 2020年 / 217卷

关键词：

CFD; Breaking waves; Free surface jump conditions; Modified k -omega SST turbulence Model;

D O I：

10.1016/j.oceaneng.2020.107746

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：

A two-phase flow Computational Fluid Dynamics (CFD) model is employed for both spilling and plunging breaking wave simulations. A numerical wave tank is built to evaluate the performance of two different free surface modelling approaches (i.e., continuous free surface conditions and free surface jump conditions) and three k - omega SST turbulence models (i.e., the original k - omega SST, the buoyancy modified k - omega SST and the free surface k - omega SST (a newly proposed model)). The influences of the free surface modelling approaches and the turbulence models are investigated by comparing with the published experimental measurements in terms of breaking point, free surface elevations, time-averaged velocity field, time-averaged turbulent kinetic energy and general turbulent behaviour, respectively. Overall, the free surface k - omega SST with the free surface jump conditions performs best in terms of the accuracy of the predictions against the experimental data and the capture of the physical breaking phenomena, for instance, the trapped air pocket and the development of the free surface in the surf zone.

引用

页数：23

共 74 条

[1]

Acheson D.J., 1991, ELEMENTARY FLUID DYN

[2]

Afshar M.A., 2010, THESIS CHALMERS U TE

[3]

[Anonymous], 1993, PHYS MODELS LAB TECH

[4]

[Anonymous], 2003, THESIS U LONDON

[5] Numerical simulation of surf-swash zone motions and turbulent flow [J].

Bakhtyar, R. ;

Barry, D. A. ;

Yeganeh-Bakhtiary, A. ;

Ghaheri, A. .

ADVANCES IN WATER RESOURCES, 2009, 32 (02) :250-263

[6] EXPERIMENTAL INVESTIGATION OF WAVE-PROPAGATION OVER A BAR [J].

BEJI, S ;

BATTJES, JA .

COASTAL ENGINEERING, 1993, 19 (1-2) :151-162

[7] A volume of fluid method based ghost fluid method for compressible multi-fluid flows [J].

Bo, Wurigen ;

Grove, John W. .

COMPUTERS & FLUIDS, 2014, 90 :113-122

[8] Numerical simulation of surf zone dynamics [J].

Bradford, SF .

JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING, 2000, 126 (01) :1-13

[9]

Bredmose H, 2010, PROCEEDINGS OF THE ASME 29TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING 2010, VOL 3, P397

[10] Evaluation of turbulence closure models under spilling and plunging breakers in the surf zone [J].

Brown, S. A. ;

Greaves, D. M. ;

Magar, V. ;

Conley, D. C. .

COASTAL ENGINEERING, 2016, 114 :177-193

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