Generation of Regular and Irregular Waves in Navier-Stokes CFD Solvers by Matching With the Nonlinear Potential Wave Solution at the Boundaries

Choi, Young-Myung; Bouscasse, Benjamin; Seng, Sopheak; Ducrozet, Guillaume; Ferrant, P.

doi:10.1115/omae2018-78077

Cited by 14 publications

(10 citation statements)

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“…Both α and fluid velocity u are relaxed in the present study. Various choices of weight functions are given in [3].…”

Section: Openfoam -Waves2foam Figure 1: Cfd Domain With Relaxation Zonesmentioning

confidence: 99%

Development of a Protocol to Couple Wave and Cfd Solvers Towards Reproducible Cfd Modeling Practices for Offshore Applications

Bouscasse¹,

Kim²,

Lim³

et al. 2021

Preprint

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Generating waves inside the CFD domain is a topic of interest in the offshore and naval industry. For practical reasons it is useful to use a potential wave kinematic solver (PWKS) to generate incident waves and use this solution to initialize and propagate incident waves in the CFD solver. Protocols to transfer the wave data from PWKS to CFD solver have been developed to ensure the reproduction of the wave kinematics from a PWKS in CFD solvers. Based on the survey results from a number of PWKS and CFD solvers available, the paper presents the various ways to express the solution and what is needed to reconstruct the fields needed in the CFD.

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“…Both α and fluid velocity u are relaxed in the present study. Various choices of weight functions are given in [3].…”

Section: Openfoam -Waves2foam Figure 1: Cfd Domain With Relaxation Zonesmentioning

confidence: 99%

Development of a Protocol to Couple Wave and Cfd Solvers Towards Reproducible Cfd Modeling Practices for Offshore Applications

Bouscasse¹,

Kim²,

Lim³

et al. 2021

Preprint

Self Cite

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“…The initial wave velocities and the free-surface positions are evaluated from the stream function wave theory [10,11]. The wave condition is identical to previous studies [1,12] and it is tabulated in Table 3.…”

Section: Figure 2 Computational Domain and Boundary Conditionsmentioning

confidence: 99%

Numerical Study on the Temporal Discretization Schemes in Two-Phase Wave Simulation

Kim

Bouscasse

Seng

et al. 2019

Volume 2: CFD and FSI

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The generation and propagation of waves in a viscous flow solver are indispensable part of naval computational fluid dynamic (CFD) applications. This paper presents numerical simulations of two-dimensional wave propagation in the framework of two-phase finite volume method (FVM) with different temporal discretization schemes. Implicit Euler, Crank-Nicolson (CN) and second-order backward temporal discretization schemes are compared by using viscous flow solver based on the open source library OpenFOAM. The combinations of each temporal discretization scheme and explicit limiter are used for the formulation of the Volume Of Fluid (VOF) field convection equation. A new formulation using the second-order backward temporal discretization scheme with explicit limiter are investigated. Two-dimensional periodic domains are considered to compare different time-stepping methods. Also, five different refinement levels of meshes are used to study the convergence properties of each method. The non-linear wave is generated with stream function wave theory using ‘foamStar’, which is a specialized OpenFOAM library package developed by Bureau Veritas in collaboration with École Centrale de Nantes.

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“…Historically, the waves used in the design process were generated as the sum of linear contributions and the quality assessment of the generated sea state was performed measuring the spectral quantities. But nonlinear waves simulations are needed to accurately reproduce long-term statistics and improve the coupling with fully-nonlinear Computational Fluid Dynamics (CFD) solvers [11]. In this nonlinear context, normalized procedure and established criteria assessing the quality of the sea state are still missing, especially for very harsh conditions.…”

Section: Introductionmentioning

confidence: 99%

Generation of 3hr Long-Crested Waves of Extreme Sea States With Hos-Nwt Solver

Canard¹,

Ducrozet²,

Bouscasse³

2021

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The accurate control of wave fields generated in experiments and numerical simulations is of great interest for the ocean engineering community. In the context of wave-structure interactions, the recommended practices of classification societies are indeed based on the definition of a wave spectrum, that needs to be reproduced. The present work intends to address this problem from the numerical point of view, using a Numerical Wave Tank equipped with a wavemaker and an absorbing beach, based on the High-Order Spectral method (HOS-NWT). The challenging case of the generation of 3-hours long-crested extreme sea states is studied in details. An iterative procedure to reproduce a target wave spectrum at a given distance from the wavemaker is proposed. The quality of the sea state obtained is evaluated using several criteria defined from spectral quantities. A validation is first performed with a highly nonlinear but non-breaking sea-state. Statistical crest distributions obtained are compared with the Forristall and Huang distributions [1,2]. Then, the Gulf of Mexico 1,000 Year Return Period wave condition is generated. This corresponds to an extreme sea state with significant wave breaking occurrence. The numerical solver needs to be able to account for this phenomenon [3]. The Tian breaking model [4,5] is calibrated to realistically reproduce the dissipation due to breaking, with particular attention paid to the spatial discretization, enlightening its significant effect on breaking model actions. Consequences on the iterative correction process * Address all correspondence to this author. are studied. The computed statistical quantities appear to be significantly different changing the spatial discretization, while the wave energy spectrum stands the same. It questions the relevance of the characterization of a sea state with the sole wave energy spectrum.

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Generation of Regular and Irregular Waves in Navier-Stokes CFD Solvers by Matching With the Nonlinear Potential Wave Solution at the Boundaries

Cited by 14 publications

References 0 publications

Development of a Protocol to Couple Wave and Cfd Solvers Towards Reproducible Cfd Modeling Practices for Offshore Applications

Development of a Protocol to Couple Wave and Cfd Solvers Towards Reproducible Cfd Modeling Practices for Offshore Applications

Numerical Study on the Temporal Discretization Schemes in Two-Phase Wave Simulation

Generation of 3hr Long-Crested Waves of Extreme Sea States With Hos-Nwt Solver

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