Numerical simulations using momentum source wave-maker applied to RANS equation model

Choi, Junwoo; Yoon, Sung Bum

doi:10.1016/j.coastaleng.2009.06.009

Cited by 218 publications

(101 citation statements)

References 15 publications

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“…Similar phenomena have been found in the piston wave maker theory (Dalrymple and Dean, 1991), and also reported by Lin and Liu (1999) and Choi and Yoon (2009) in the internal wave maker theory using the grid-based models. Here it should be pointed out that in Fig.…”

Section: Periodic Wave Generationssupporting

confidence: 60%

“…The discrepancy in the first wave gauge is within expectation. As evidenced in the internal wave maker theory (Choi and Yoon, 2009), the wave parameters are usually not very accurate in the areas close to the source region. Similar issues have also been found in SPH simulations using a fixed wave paddle.…”

Section: Periodic Wave Generationsmentioning

confidence: 99%

“…In Wei et al's theory, the Boussinesq equations were employed to derive the relationships between the surface elevation and the target wave. Following this, Choi and Yoon (2009) presented the general form of the momentum source function as…”

Section: Momentum Source Termmentioning

confidence: 99%

“…In their work, both the mass and momentum source functions have been presented. Later improvements have been made by Choi and Yoon (2009) and Ha et al (2013). However, all of these investigations were based on the grid method, while there has been no similar work carried out in the particle modeling approach so far.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, by following Wei et al (1999) and Choi and Yoon (2009) an internal wave maker algorithm based on the momentum conservation is introduced into the ISPH method. In the formulations the momentum source term derived from the regular wave theories will be added into the NS equations as an internal particle force, which changes with the time and position.…”

Section: Introductionmentioning

confidence: 99%

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ISPH wave simulation by using an internal wave maker

Liu

Lin

Shao

2015

Coastal Engineering

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In this paper, a non-reflection internal wave maker algorithm is included in the incompressible Smoothed Particle Hydrodynamics (ISPH) model for the wave simulations. A momentum source term derived from the Boussinesq equations is employed and added into the Lagrangian form of Navier-Stokes equations for the wave generations that are not affected by the reflected waves. In this work, the technical details of implementing the internal force into the ISPH equations are proposed and a series of numerical tests are carried out for the selection of relevant parameters and investigation of their sensitivities in different wave conditions. In model applications, the problems of wave propagation and reflection from a vertical wall are studied to verify the model performance in standing wave generations and the non-reflection characteristics of the internal wave maker. Furthermore, a more challenging wave decomposition process over a trap-* Corresponding author, Tel.: +86 028-85406172; Fax: +86 028-85405148 E-mail address: cvelinpz@126.com ezoid breakwater is presented, which has not been fully investigated by other similar particle-based methods. The simulation results of wave surface profile on six wave gauges agree well with the experimental results and this shows that the present model with the non-reflection internal wave maker can provide a more robust particle modeling tool for the long time simulation of wave and wave-structure interactions.

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Section: Periodic Wave Generationssupporting

confidence: 60%

Section: Periodic Wave Generationsmentioning

confidence: 99%

Section: Momentum Source Termmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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ISPH wave simulation by using an internal wave maker

Liu

Lin

Shao

2015

Coastal Engineering

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Modified incompressible smooth particle hydrodynamics in porous media method for modeling the damping of a waves train on an inclined porous structure

Ortega

Beaudoin

2021

Numerical Methods in Fluids

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In this work, the ISPHP method proposed by Akbari and Namin in 2013 has been modified by implementing the Taylor expansion of a classical smoothing function. The modified ISPHP method with the Taylor expansion of the smoothing function, the optimization of the solving of Poisson's equation and the wave maker, has been used to simulate the damping of a waves train on an inclined porous structure. The comparison between the numerical results obtained with the modified ISPHP method and the experimental data obtained by Carrasco et al. in 2020 has shown on the one hand that the modified ISPHP method could be used to study the damping of a waves train on an inclined porous structure and on the other hand that the dimensionless number χ could be used to characterize the energy transformations of the interaction of a waves train and an inclined porous structure.

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A CFD study of coupled aerodynamic‐hydrodynamic loads on a semisubmersible floating offshore wind turbine

Tran

Kim

2017

Wind Energy

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The prediction of dynamic characteristics for a floating offshore wind turbine (FOWT) is challenging because of the complex load coupling of aerodynamics, hydrodynamics, and structural dynamics. These loads should be accurately calculated to yield reliable analysis results in the design phase of a FOWT. In this study, a high-fidelity fluid-structure interaction simulation that simultaneously considers the influence of aero-hydrodynamic coupling due to the dynamic motion of a FOWT has been conducted using computational fluid dynamics based on an overset The dynamic influence of aero-hydro-structure interaction due to the coupled wind-wave loads on a floating offshore wind turbine (FOWT) is still not well understood. Various experimental floating substructures in both wave basin facilities and ocean coasts have been constructed or are in the planning stages throughout the world. 1-7 The current status of both of them is well described in the previous studies. [2][3][4] From the viewpoint of engineering, compared to a full-scale test on an ocean field, a wave basin test for a scaled-down model can reduce risk, cost, and uncertainties in the design. Dynamic characteristics of floating structure from a wave basin test can be approximately evaluated. However, its results are highly influenced by purpose of tests and quality of experiment equipment (eg, installed sensors and wind and wave generation quality). Moreover, previous experimental works did not adequately consider the same material, construction methods, or deployment method as the full-scale system. 7 In particular, a scaled-down model experiment in a wave basin inherently has limitations on the simultaneous satisfaction of both Froude and Reynolds scaling laws. [8][9][10][11] The scaled-down model is typically scaled by the dimensionless Froude number to ensure the similarity of platform hydrodynamic whereas the tip-speed ratio and wind speed to wave celerity ratio between scales is maintained to entirely consistent with Froude scaling. 8 However, an experiment on a FOWT is usually more expensive than a sophisticated design tool, which is preferred for cost-effective solutions during the design process. Therefore, sophisticated modeling tools must be developed to accurately simulate the complex multiphysical phenomena induced by aero-hydro-multibody dynamic coupling for a FOWT. 1 The dynamic characteristics of FOWTs have been properly analyzed by fully coupled aero-hydro-servo-elastic dynamic approaches. [12][13][14] However, the unsteady aerodynamic calculation in these approaches was performed using the well-known blade element momentum (BEM)

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Numerical simulations using momentum source wave-maker applied to RANS equation model

Cited by 218 publications

References 15 publications

ISPH wave simulation by using an internal wave maker

ISPH wave simulation by using an internal wave maker

Modified incompressible smooth particle hydrodynamics in porous media method for modeling the damping of a waves train on an inclined porous structure

A CFD study of coupled aerodynamic‐hydrodynamic loads on a semisubmersible floating offshore wind turbine

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