Numerical simulation of wave and current interaction with a fixed offshore substructure

Kim, Sung-Yong; Kim, Kyungmi; Park, Jong-Chun; Jeon, Gyu-Mok; Hu, Chun

doi:10.1016/j.ijnaoe.2016.02.002

Cited by 42 publications

(27 citation statements)

References 14 publications

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“…No-slip conditions were imposed on the buoy surface and bottom boundary. For outflow boundary, the "pressure outlet" boundary condition was used while adopting grid damping technique [27] to minimize the wave reflection at the boundary. For the side boundaries, the "symmetry plane" boundary condition was used [25,26].…”

Section: Resultsmentioning

confidence: 99%

Estimation of the Motion Performance of a Light Buoy Adopting Ecofriendly and Lightweight Materials in Waves

Jeong

Son

Lee

2020

JMSE

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In this study, the methods and results of numerical simulations to estimate the motion performance of a newly developed lightweight light buoy in waves and to check the effect of conceptually developed appendages on that performance were introduced. The results from a potential-based motion analysis with viscous damping coefficients obtained from free decay tests using computational fluid dynamics (CFD) and those obtained from wave motion simulation using CFD were compared. From these results, it was confirmed that viscous damping should be considered when the frequency of an incoming wave is close to the natural frequency of the buoy. It was estimated that the pitch and heave motions of the light buoy became smaller when the developed appendages were adopted. Although the quantitative superiority of the appendages was different, the qualitative superiority was similar between both results.

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Section: Resultsmentioning

confidence: 99%

Estimation of the Motion Performance of a Light Buoy Adopting Ecofriendly and Lightweight Materials in Waves

Jeong

Son

Lee

2020

JMSE

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“…However, recent researches in wave energy conversion domain have focused on experimental analyses using numerical wave tanks (NWT) for flow characteristics prediction in OWC systems with the help of CFD methods. The NWT system is based on the VOF model to generate the incoming incident wave by either employing the Reynolds Navier Stokes model as in [5] or a velocity potential approach [6,7].…”

Section: Introductionmentioning

confidence: 99%

Wave generation in an OWC system for wave energy conversion

2020

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This paper aims to present an overview on the wavemakers used to generate waves inside a numerical wave tank taking into consideration the biphasic air-water aspect of the incident wave. Wave markers are used to simulate the flow dynamic behaviour in the Oscillating Water Column (OWC) for wave energy conversion. Three kinds of these systems have been considered in the present work. To compare these types of wave generators a case study was adopted with the assumption of a fluid flow which is unsteady, 2D, biphasic (air-water), and k-epsilon turbulent. It has been found that the piston and the flap wave maker types are suitable for OWC device simulations.

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“…ANSYS FLUENT was also used by [17] and [18] to generate regular waves and investigate wave-structure interaction. Initially, [17] generated regular waves and validated the model using a higher order theory, Stokes 2 nd Order Theory (S2OT), before investigating the effect of waves interacting with a vertical cylinder.…”

Section: Introductionmentioning

confidence: 99%

“…[17] concluded that the maximum wave height decreased in the presence of the structure and comparisons between experimental and numerical results showed good agreement. [18] developed a NWT specifically to simulate wave-current interactions in offshore environments with offshore structures. A detailed investigation into the damping domain was provided alongside a study to optimise the mesh sizing.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies also examine wave only flow characteristics and do not consider combined wave and current conditions. This study aims to build upon the findings of previous studies, for optimisation of the numerical model [11], [13], [20], while investigating combined wave and current interactions [18], [21], [22], specifically studying the sub surface particle velocities through the water depth. The main focus of this work is to establish a NWT which can accurately simulate the sub surface motions between a uniform current and regular S2OT waves.…”

Section: Introductionmentioning

confidence: 99%

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Development of a wave-current numerical model using Stokes 2nd Order Theory

2019

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The optimisation of a Numerical Wave Tank is proposed to accurately model the sub surface conditions generated by regular waves superimposed on a uniform current velocity. ANSYS CFX 18.0 was used to develop a homogenous multiphase model with volume fractions to define the different phase regions. By applying CFX Expression Language at the inlet of the model, Stokes 2nd Order Theory was used to define the upstream wave and current characteristics. Horizontal and vertical velocity components, as well as surface elevation of the numerical model were compared against theoretical and experimental wave data for 3 different wave characteristics in 2 different water depths. The comparison highlighted the numerical homogeneity between the theoretical and experimental data. Therefore, this study has shown that the modelling procedure used can accurately replicate experimental testing facility flow conditions, providing a potential substitute to experimental flume or tank testing.

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Numerical simulation of wave and current interaction with a fixed offshore substructure

Cited by 42 publications

References 14 publications

Estimation of the Motion Performance of a Light Buoy Adopting Ecofriendly and Lightweight Materials in Waves

Estimation of the Motion Performance of a Light Buoy Adopting Ecofriendly and Lightweight Materials in Waves

Wave generation in an OWC system for wave energy conversion

Development of a wave-current numerical model using Stokes 2nd Order Theory

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