Modelling of Violent Water Wave Propagation and Impact by Incompressible SPH with First-Order Consistent Kernel Interpolation Scheme

Zheng, Xing; Ma, Qingwei; Shao, Songdong; Khayyer, Abbas

doi:10.3390/w9060400

Cited by 19 publications

(7 citation statements)

References 31 publications

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“…Due to the infiltration of the water, the permeable structure has a significant impact on its discharge capacity [37]. It can be seen from the horizontal and vertical comparison of the flow field in Figure 16 that with the increase of porosity, the flow resistance decreases.…”

Section: Longitudinal and Vertical Flow Field Distribution Under Diffmentioning

confidence: 99%

SPH Simulation of Interior and Exterior Flow Field Characteristics of Porous Media

Song

Rubinato

Gui

2020

Water

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At the present time, one of the most relevant challenges in marine and ocean engineering and practice is the development of a mathematical modeling that can accurately replicate the interaction of water waves with porous coastal structures. Over the last 60 years, multiple techniques and solutions have been identified, from linearized solutions based on wave theories and constant friction coefficients to very sophisticated Eulerian or Lagrangian solvers of the Navier-Stokes (NS) equations. In order to explore the flow field interior and exterior of the porous media under different working conditions, the Smooth Particle Hydrodynamics (SPH) numerical simulation method was used to simulate the flow distribution inside and outside a porous media applied to interact with the wave propagation. The flow behavior is described avoiding Euler’s description of the interface problem between the Euler mesh and the material selected. Considering the velocity boundary conditions and the cyclical circulation boundary conditions at the junction of the porous media and the water flow, the SPH numerical simulation is used to analyze the flow field characteristics, as well as the longitudinal and vertical velocity distribution of the back vortex flow field and the law of eddy current motion. This study provides innovative insights on the mathematical modelling of the interaction between porous structures and flow propagation. Furthermore, there is a good agreement (within 10%) between the numerical results and the experimental ones collected for scenarios with porosity of 0.349 and 0.475, demonstrating that SPH can simulate the flow patterns of the porous media, the flow through the inner and outer areas of the porous media, and the flow field of the back vortex region. Results obtained and the new mathematical approach used can help to effectively simulate with high-precision the changes along the water depth, for a better design of marine and ocean engineering solutions adopted to protect coastal areas.

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Section: Longitudinal and Vertical Flow Field Distribution Under Diffmentioning

confidence: 99%

SPH Simulation of Interior and Exterior Flow Field Characteristics of Porous Media

Song

Rubinato

Gui

2020

Water

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“…Fig. 1 A sample particle configuration including coarse and fine particle distributions A pressure gradient model with first-order consistency has been recently proposed for more efficient modeling violent wave impact [47]:…”

Section: Gradient Modelmentioning

confidence: 99%

“…Efficient algorithm is needed to determine which particles are on free surface during simulation time. The particle density or the divergence rules have been widely used in I-SPH approach [47]. In the classic incompressible SPH method, uniform particle distributions are chosen to represent initial conditions and a particle number density as follows is used to determine free surface particles:…”

Section: Free Surfacesmentioning

confidence: 99%

Modified incompressible SPH method for simulating free surface problems using highly irregular multi-resolution particle configurations

Shobeyri

Ardakani

2019

J Braz. Soc. Mech. Sci. Eng.

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In this study, the conventional incompressible smoothed particle hydrodynamics (I-SPH) formulations are modified to be applicable for highly irregular multi-resolution particle distributions for simulation of transient free surface flows. The modifications are based on distinguishing between particle density calculated by interpolation functions in SPH method and fluid density as a physical quantity. I-SPH is a fully Lagrangian method having great potential in dealing with large deformations of the free surface. Flow domain is discretized into a set of moving particles, and each particle carries mass, velocity and pressure during simulation time. Variations in these field parameters can be determined by temporal discretization of Navier-Stokes equation followed by a spatial discretization using I-SPH method. In addition to this, three pressure gradient models are employed for simulation of free surface flows to examine efficiency of the models coupled with the modifications. Furthermore, a simple and efficient method to find free surface particles which is compatible with highly irregular multiresolution particle distributions is proposed. The modified approach is tested against different free surface problems using highly irregular particle configurations. The classic pressure gradient model employed in SPH method coupled with constant smoothing distance gives accurate results with lower computational times over highly irregular particle distributions. The method can be applied for adaptive refinement strategy to reduce computational times of transient free surface problems.

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“…The low order of SPH interpolation near boundaries which is the major deficit of this method was addressed by Zheng et al [35] by coupling SPH and Taylor expansion methods. Recently, this method has been applied to simulate violent water wave propagation to obtain the pressure field with higher accuracy [37]. A normalization technique was used to establish a correction matrix which is multiplied into the gradient of the kernel in the ISPH Laplacian model to achieve high accuracy even for highly irregular particle distributions [15].…”

Section: Introductionmentioning

confidence: 99%

Accuracy analysis of different Laplacian models of incompressible SPH method improved by using Voronoi diagram

Shobeyri

2020

J Braz. Soc. Mech. Sci. Eng.

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Modelling of Violent Water Wave Propagation and Impact by Incompressible SPH with First-Order Consistent Kernel Interpolation Scheme

Cited by 19 publications

References 31 publications

SPH Simulation of Interior and Exterior Flow Field Characteristics of Porous Media

SPH Simulation of Interior and Exterior Flow Field Characteristics of Porous Media

Modified incompressible SPH method for simulating free surface problems using highly irregular multi-resolution particle configurations

Accuracy analysis of different Laplacian models of incompressible SPH method improved by using Voronoi diagram

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