Extreme Wave Generation, Breaking, and Impact Simulations Using Wave Packets in REEF3D

Bihs, Hans; Kamath, Arun; Chella, Mayilvahanan Alagan; Arntsen, Øivind Asgeir

doi:10.1115/1.4042178

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…Dispersive high-frequency acoustic waves in water-filled pipes were simulated in Louati and Ghidaoui (2019). Extreme wave generation, breaking and impact were simulated in Bihs, Kamath, Chella and Arntsen (2019b). Efficient wave modelling using non-hydrostatic pressure distribution and free surface tracking was investigated in Bihs, Kamath, Aggarwal and Pakozdi (2019a).…”

Section: Applicationsmentioning

confidence: 99%

Essentially non-oscillatory and weighted essentially non-oscillatory schemes

Shu¹

2020

Acta Numerica

118

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Essentially non-oscillatory (ENO) and weighted ENO (WENO) schemes were designed for solving hyperbolic and convection–diffusion equations with possibly discontinuous solutions or solutions with sharp gradient regions. The main idea of ENO and WENO schemes is actually an approximation procedure, aimed at achieving arbitrarily high-order accuracy in smooth regions and resolving shocks or other discontinuities sharply and in an essentially non-oscillatory fashion. Both finite volume and finite difference schemes have been designed using the ENO or WENO procedure, and these schemes are very popular in applications, most noticeably in computational fluid dynamics but also in other areas of computational physics and engineering. Since the main idea of the ENO and WENO schemes is an approximation procedure not directly related to partial differential equations (PDEs), ENO and WENO schemes also have non-PDE applications. In this paper we will survey the basic ideas behind ENO and WENO schemes, discuss their properties, and present examples of their applications to different types of PDEs as well as to non-PDE problems.

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Section: Applicationsmentioning

confidence: 99%

Essentially non-oscillatory and weighted essentially non-oscillatory schemes

Shu¹

2020

Acta Numerica

118

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“…Here, the time derivatives are solved by applying the third-order accurate Total Variation Diminishing (TVD) Runge-Kutta scheme [5]. The same time discretisation is also used in (6) and (7). Turbulence time advancement is solved using implicit methods due to its source term driven character.…”

Section: Reef3d::cfdmentioning

confidence: 99%

“…In [6], the wave generation and absorption were validated and compared to other CFD codes. Bihs et al [7] analysed the generation, propagation and impact of wave packets using REEF3D. Breaking waves and their interaction with a complex jacket structure were investigated by Aggarwal et al [8].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Different Wave Modelling Techniques in An Open-Source Hydrodynamic Framework

Wang¹,

Kamath²,

Pákozdi³

et al. 2020

JMSE

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Modern design for marine and coastal activities places increasing focus on numerical simulations. Several numerical wave models have been developed in the past few decades with various techniques and assumptions. Those numerical models have their own advantages and disadvantages. The proper choice of the most useful numerical tool depends on the understanding of the validity and limitations of each model. In the past years, REEF3D has been developed into an open-source hydrodynamic numerical toolbox that consists of several modules based on the Navier–Stokes equations, the shallow water equations and the fully nonlinear potential theory. All modules share a common numerical basis which consists of rectilinear grids with an immersed boundary method, high-order finite differences and high-performance computing capabilities. The numerical wave tank of REEF3D utilises a relaxation method to generate waves at the inlet and dissipate them at the numerical beach. In combination with the choice of the numerical grid and discretisation methods, high accuracy and stability can be achieved for the calculation of free surface wave propagation and transformation. The comparison among those models provide an objective overview of the different wave modelling techniques in terms of their numerical performance as well as validity. The performance of the different modules is validated and compared using several benchmark cases. They range from simple propagations of regular waves to three-dimensional wave breaking over a changing bathymetry. The diversity of the test cases help with an educated choice of wave models for different scenarios.

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“…The REEF3D::CFD module has already been used as numerical wave tank (NWT) [10,11]. The module solves the Navier-Stokes equations with a two-phase fluid model which makes the software able to simulate breaking waves [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Validation of Numerical Wave Tank Simulations Using Reef3d With Jonswap Spectra in Intermediate Water Depth

Pákozdi¹,

Fouques²,

Thys³

et al. 2021

Preprint

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As offshore wind turbines increase in size and output, the support structures are also growing. More sophisticated assessment of the hydrodynamic loads is needed, particularly for the ultimate limit state design. For higher-order phenomena related to rare steep wave events such as ringing, a better understanding of the stochastic loads is needed. As an innovative step forward to reduce the cost of extensive model tests with irregular waves, a larger number of investigations can be carried out using highperformance high-fidelity numerical simulations after an initial stochastic validation with model test data.In this paper, the open-source hydrodynamic model REEF3D::FNPF (Fully Nonlinear Potential Flow) is used to carry out three-hour long simulations with the JONSWAP spectrum in intermediate water depth conditions. Statistical properties of the free surface elevation in the numerical wave tank are validated using the available data from model tests carried out at SINTEF Ocean/NTNU. The spectral shape, significant wave height, peak period, skewness, kurtosis, and wave crest height statistics are compared. The results are analyzed and it is found * Address all correspondence to this author. that the numerical model provides reasonably good agreement with the model test data.

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Extreme Wave Generation, Breaking, and Impact Simulations Using Wave Packets in REEF3D

Cited by 8 publications

References 29 publications

Essentially non-oscillatory and weighted essentially non-oscillatory schemes

Essentially non-oscillatory and weighted essentially non-oscillatory schemes

A Comparison of Different Wave Modelling Techniques in An Open-Source Hydrodynamic Framework

Validation of Numerical Wave Tank Simulations Using Reef3d With Jonswap Spectra in Intermediate Water Depth

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