A SPH numerical wave basin for modeling wave-structure interactions

Wen, Hongjie; Ren, Bing; Dong, Ping; Wang, Yongxue

doi:10.1016/j.apor.2016.06.012

Cited by 48 publications

(8 citation statements)

References 42 publications

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“…To prevent the undesirable wave reflection, a viscous damping zone is added at the downstream end of the numerical wave flume [70]. The damping zone has very high artificial viscosity and dissipates the kinetic energy of a fluid particle when it goes into this region.…”

Section: Wave Making and Wave Absorbtionmentioning

confidence: 99%

The suction effect during freak wave slamming on a fixed platform deck: Smoothed particle hydrodynamics simulation and experimental study

et al. 2019

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During the process of wave slamming on a structure with sharp corners, the wave receding after wave impingement can induce strong negative pressure (relative to the atmospheric pressure) at the bottom of the structure, which is called the suction effect. From the practical point of view, the suction force induced by the negative pressure, coinciding with the gravity force, pulls the structure down and hence increases the risk of structural damage. In this work, the smoothed particle hydrodynamics (SPH) method, more specifically the δ + SPH model, is adopted to simulate the freak wave slamming on a fixed platform with the consideration of the suction effect, i.e. negative pressure, which is a challenging issue because it can cause the so-called tensile instability (TI) in SPH simulations. Key to overcome the numerical issue is to use a numerical technique named tensile instability control (TIC). Comparative studies using SPH models with and without TIC will show the importance of this technique in capturing the negative pressure. It is also found that using a two-phase simulation that takes the air phase into account is essential for an SPH model to accurately predict the impact pressure during the initial slamming stage. The freak wave impacts with different water depths are studied. All the multiphase SPH results are validated by our experimental data. The wave kinematics/dynamics and wave impact features in the wave-structure interacting process are discussed and the mechanism of the suction effect characterized by negative pressure is carefully analyzed.

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Section: Wave Making and Wave Absorbtionmentioning

confidence: 99%

The suction effect during freak wave slamming on a fixed platform deck: Smoothed particle hydrodynamics simulation and experimental study

et al. 2019

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“…The present study SPH 3D Mass-weighted damping zone 0.013-0.094, 0.160 Altomare et al [24] SPH 2D Active, passive absorber 0.010, 0.033 Wen et al [27] SPH-LES 3D sponge layer, periodic 0.049, 0.059 Altomare et al [32] SPH 2D damping zone 0.0108-0.0352 Didier and Neves [23] SPH 2D Active absorber 0.053 Zhang et al [33] Dynamic mesh 2D Boundary treatment 0.013-0.022 Dong and Huang [34] Finite-analytic 2D Boundary layer 0.0042-0.011 Wu et al [35] MFS 2D Damping zone 0.0409-0.0488 Tian et al [2] CFD 3D Damping zone, outlet 0.032-0.057 Machado et al [31] CFD 2D Beach, outlet 0.02 Prasad et al [29] CFD 2D Free slip, no-slip 0.042 Anbarsooz et al [36] CFD 2D Damping zone 0.0094-0.0488…”

Section: Dimensions Boundary Conditions Wave Steepnessmentioning

confidence: 55%

“…Inflow and outflow regions were used by imposing the velocity and pressure to boundaries, and the numerical wave is damped using an artificial viscosity equation. Wen et al [27] simulated three-dimensional wave interaction with coastal structures by using a parallelized weakly compressible SPH code, and the sponge layer and active absorbing wavemaker were introduced to ensure accuracy in the simulation. Domínguez et al [28] applied SPH to simulate the interaction of sea waves with floating structures by coupling an open-source code DualSPHysics with a lumped-mass mooring dynamics mode.…”

Section: Introductionmentioning

confidence: 99%

A Semi-Infinite Numerical Wave Tank Using Discrete Particle Simulations

Lee

Hong

2020

JMSE

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With an increasing number of offshore structures for marine renewable energy, various experimental and numerical approaches have been performed to investigate the interaction of waves and structures to ensure the safety of the offshore structures. However, it has been very expensive to carry out real-scale large experiments and simulations. In this study, numerical waves with various relative depths and a wide range of wave steepness are precisely simulated by minimizing the wave reflection with a mass-weighted damping zone located at the end of a numerical wave tank (NWT). To achieve computational efficiency, optimal variables including initial spacing of smoothed particles, calculation time step, and damping coefficients are studied, and the numerical results are verified by comparison with both experimental data and analytical formula, in terms of wave height, particle velocities, and wave height-to-stroke ratio. Those results show good agreement for all wave steepness smaller than 0.067. By applying the proposed methodology, it is allowed to use a numerical wave tank of which the length is smaller than that of the wave tank used for experiments. The developed numerical technique can be used for the safety analysis of offshore structures through the simulation of fluid-structure interaction.

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“…The developed model was applied to the Vortex-Induced Vibration (VIV) of a circular cylinder in laminar cross-flow. By adopting a parallel SPH model, Wen et al (2016) proposed 3D numerical wave basin to study the wave impact on a vertical cylinder. Their OpenMP programming technology, combined with an existing MPI program contained in the parallel version of SPHysics code, was implemented to enable the simulation of several hundred million particles.…”

Section: Introductionmentioning

confidence: 99%

3D ISPH erosion model for flow passing a vertical cylinder

Wang

Shao

et al. 2018

Journal of Fluids and Structures

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In this paper a 3D incompressible Smoothed Particle Hydrodynamics (ISPH) erosion model is proposed to simulate the scouring process behind a large vertical cylinder. The erosion model is based on the turbidity water particle concept and the sediment motion is initiated when the fluid bottom shear stress exceeds the critical value. The previous 2D SPH sediment initiation model is expanded by combining the effects of both transverse and longitudinal sloping beds in a practical 3D situation. To validate the developed model, a laboratory flume experiment was carried out to study the clear water scouring around a vertical cylinder under unidirectional current, in which high-speed video cameras were used for the real-time monitoring of sediment movement. The 3D ISPH results are compared with the experimental data with good agreement in terms of the scouring patterns and scales. Besides, the computed flow velocity field suggests that both the horseshoe vortices and lee-wake flows around the cylinder have been accurately simulated.

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A SPH numerical wave basin for modeling wave-structure interactions

Cited by 48 publications

References 42 publications

The suction effect during freak wave slamming on a fixed platform deck: Smoothed particle hydrodynamics simulation and experimental study

The suction effect during freak wave slamming on a fixed platform deck: Smoothed particle hydrodynamics simulation and experimental study

A Semi-Infinite Numerical Wave Tank Using Discrete Particle Simulations

3D ISPH erosion model for flow passing a vertical cylinder

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