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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Fundamental Characteristics of Fluidable Material Dam Break Flow with Finite Extent and Its Application
TL;DR: In this article, the authors investigated the flow characteristics of viscous Newtonian and non-Newtonian fluids and derived the characteristics of inertial and viscous phase flow using the VOF-CIP model.
Numerical Simulations of 3D Liquid Sloshing Flows by MPS Method
TL;DR: In this paper, a modified MPS (Moving Particle SemiImplicit) method is applied into 3D liquid sloshing to show its capability in modeling 3D viscous flows.
Dissertation
Development of Smoothed Particle Hydrodynamics approach for modelling of multiphase flows with interfaces
TL;DR: An important part of work is a thorough comparison of two different incompressibility treatments: the weakly compressible approach, where a suitably chosen equation of state is used, and truly incompressible method, where the velocity field is projected onto a divergence-free space.
Journal ArticleDOI
A numerically consistent multiphase poiseuille flow computation by a new particle method
TL;DR: In this paper, a consistent method in discretizing the diffusion term is implemented in particle-based fluid flow solver (namely the Moving Particle Pressure Mesh (MPPM) method), which is then used to solve a multiphase Poiseuille flow problem.
Journal ArticleDOI
3d simulation of blocking of bridge in mountain stream by drift woods
TL;DR: In this article, a numerical analysis by the MPS method is executed in the 3D field to simulate dam-up process of drift woods onto a small slab bridge in a mountain stream.
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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