Journal ArticleDOI
Numerical analysis of breaking waves using the moving particle semi-implicit method
TLDR
In this paper, a moving particle semi-implicit (MPS) algorithm is used for two-dimensional incompressible non-viscous flow analysis and two types of breaking waves, plunging and spilling breakers, are observed in the calculation results.Abstract:
SUMMARY The numerical method used in this study is the moving particle semi-implicit (MPS) method, which is based on particles and their interactions. The particle number density is implicitly required to be constant to satisfy incompressibility. A semi-implicit algorithm is used for two-dimensional incompressible non-viscous flow analysis. The particles whose particle number densities are below a set point are considered as on the free surface. Grids are not necessary in any calculation steps. It is estimated that most of computation time is used in generation of the list of neighboring particles in a large problem. An algorithm to enhance the computation speed is proposed. The MPS method is applied to numerical simulation of breaking waves on slopes. Two types of breaking waves, plunging and spilling breakers, are observed in the calculation results. The breaker types are classified by using the minimum angular momentum at the wave front. The surf similarity parameter which separates the types agrees well with references. Breaking waves are also calculated with a passively moving float which is modelled by particles. Artificial friction due to the disturbed motion of particles causes errors in the flow velocity distribution which is shown in comparison with the theoretical solution of a cnoidal wave. © 1998 John Wiley & Sons, Ltd.read more
Citations
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Journal ArticleDOI
Sloshing impact simulation with material point method and its experimental validations
TL;DR: In this paper, the material point method (MPM) is extended to solve the dynamic behavior of sloshing liquids in a moving container and a numerical scheme is developed to calculate impact pressure based on a contact algorithm over background grids.
Journal ArticleDOI
A Three-dimensional Particle Method for Violent Sloshing under Regular and Irregular Excitations
Min Luo,Chan Ghee Koh,Wei Bai +2 more
TL;DR: In this article, a 3D numerical model is presented in the framework of Consistent Particle Method (CPM) for water sloshing under translational and rotational excitations.
Journal ArticleDOI
An incompressible SPH scheme with improved pressure predictions for free-surface generalised Newtonian flows
TL;DR: In this article, the diffusion-based incompressible SPH (ISPH) method is extended to solve inelastic non-Newtonian flows, introducing standard viscosity calculation techniques for the non-newtonian fluids and adopting a new viscous term which is more suitable for the calculation of such flows.
Journal ArticleDOI
QALE‐FEM for modelling 3D overturning waves
Shiqiang Yan,Qingwei Ma +1 more
TL;DR: In this article, a further development of the QALE-FEM (quasi-arbitrary Lagrangian-Eulerian finite element method) based on a fully nonlinear potential theory is presented.
Journal ArticleDOI
An MPS-based particle method for simulation of multiphase flows characterized by high density ratios by incorporation of space potential particle concept
TL;DR: The proposed coupling scheme guarantees the continuity of pressure and space (volume conservation) at the phase interface without any need for commonly applied density smoothing/averaging schemes or application of numerical stabilizing terms.
References
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Journal ArticleDOI
Moving-Particle Semi-Implicit Method for Fragmentation of Incompressible Fluid
Seiichi Koshizuka,Yoshiaki Oka +1 more
TL;DR: In this paper, a moving-particle semi-implicit (MPS) method for simulating fragmentation of incompressible fluids is presented, where the motion of each particle is calculated through interactions with neighboring particles covered with the kernel function.
Journal ArticleDOI
Breaker type classification on three laboratory beaches
TL;DR: Breaker type, for waves on smooth concrete slopes, depends on beach slope m, wave period T, and either deep-water or breaker height, H 0 or Hb as discussed by the authors.
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