Impulsive plunging wave breaking downstream of a bump in a shallow water flume—Part II: Numerical simulations

Koo, Bonguk; Wang, Zhaoyuan; Yang, Jianming; Stern, Frederick

doi:10.1016/j.jfluidstructs.2011.10.011

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…The effects of breaking wave intensity on the wave breaking flows were numerically investigated by Iafrati (2009), and detailed quantitative estimates of the drops and bubbles in breaking waves were made using the level-set method in Iafrati (2010). An integrated experimental and CFD study was conducted by Kang et al (2012) and Koo et al (2012) for the plunging wave breaking over a submerged bump with a focus on the overall plunging wave breaking process. The major wave breaking events, such as jet plunge, oblique splash, vertical jet and repeated processes were identified.…”

Section: Introductionmentioning

confidence: 99%

“…This is critical for simulations using billions of grid points since the memory of a few processors is insufficient to handle such huge data sets. Numerous numerical tests and application examples have been performed to verify and validate the code such as a static drop in equilibrium for surface tension modelling, a small-scale single bubble rising in quiescent water, droplet impact onto a liquid pool and plunging wave breaking (Yang & Stern 2007, 2009Wang et al 2009a,b;Suh et al 2011;Koo et al 2012;Wang et al 2012a-d). The accuracy, robustness and efficiency of the numerical methods especially for interface tracking, sharp interface treatment and surface tension modelling have been extensively verified.…”

Section: Introductionmentioning

confidence: 99%

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High-fidelity simulations of bubble, droplet and spray formation in breaking waves

2016

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High-fidelity simulations of wave breaking processes are performed with a focus on the small-scale structures of breaking waves, such as bubble/droplet size distributions. Very large grids (up to 12 billion grid points) are used in order to resolve the bubbles/droplets in breaking waves at the scale of hundreds of micrometres. Wave breaking processes and spanwise three-dimensional interface structures are identified. It is speculated that the Görtler type centrifugal instability is likely more relevant to the plunging wave breaking instabilities. Detailed air entrainment and spray formation processes are shown. The bubble size distribution shows power-law scaling with two different slopes which are separated by the Hinze scale. The droplet size distribution also shows power-law scaling. The computational results compare well with the available experimental and computational data in the literature. Computational difficulties and challenges for large grid simulations are addressed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-fidelity simulations of bubble, droplet and spray formation in breaking waves

2016

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“…The techniques and schemes used in this solver have been extensively verified and validated and applied in the simulations related to ship hydrodynamics. [1][2][3][4][5][6][7][8] Cartesian grid is simple and easy to generate, and the complex geometry can be handled using the immersed boundary method (IBM). However, large numbers of grid points are required in order to resolve the boundary layer since the Cartesian grid line usually does not coincide with the body surface.…”

Section: Introductionmentioning

confidence: 99%

Sharp Interface LES of Breaking Waves by an Interface Piercing Body in Orthogonal Curvilinear Coordinates

Wang

Suh

Yang

et al. 2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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A sharp interface LES methodology on orthogonal curvilinear grid for breaking waves produced by an interface-piercing body at high Reynolds number is presented. Both gas and liquid phases are considered for the strong interactions between two phases, such as spray dispersion and bubble entrainment. The level-set based ghost fluid method is adopted for sharp interface treatment and a volume-of-fluid method in orthogonal curvilinear coordinates is coupled with the level set method for enhanced interface tracking. A Lagrangian dynamic Smagorinsky subgrid-scale model is used for the spatially filtered turbulence closure. Several numerical tests are conducted in order to validate the code. Wave breaking around a wedge-shaped bow is simulated with the results compared with the experimental measurement.

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Numerical simulation of dam-break flow impacting a stationary obstacle by a CLSVOF/IB method

Wen

et al. 2019

Communications in Nonlinear Science and Numerical Simulation

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Impulsive plunging wave breaking downstream of a bump in a shallow water flume—Part II: Numerical simulations

Cited by 14 publications

References 39 publications

High-fidelity simulations of bubble, droplet and spray formation in breaking waves

High-fidelity simulations of bubble, droplet and spray formation in breaking waves

Sharp Interface LES of Breaking Waves by an Interface Piercing Body in Orthogonal Curvilinear Coordinates

Numerical simulation of dam-break flow impacting a stationary obstacle by a CLSVOF/IB method

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