Boundary Conditions Generated by Dynamic Particles in SPH Methods

Smoothed Particle Hydrodynamics is a purely Lagrangian method that can be applied to a wide variety of fields. The foundation and properties of the so called dynamic boundary particles (DBPs) are described in this paper. These boundary particles share the same equations of continuity and state as th...

Full description

Saved in:
Bibliographic Details
Published in:Computers, materials & continua materials & continua, 2007, Vol.5 (3), p.173-184
Main Authors: Crespo, A J C, Gómez-Gesteira, M, Dalrymple, R A
Format: Article
Language:English
Subjects:
Boundary conditions
Computational fluid dynamics
Fluid flow
Smooth particle hydrodynamics
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Smoothed Particle Hydrodynamics is a purely Lagrangian method that can be applied to a wide variety of fields. The foundation and properties of the so called dynamic boundary particles (DBPs) are described in this paper. These boundary particles share the same equations of continuity and state as the moving particles placed inside the domain, although their positions and velocities remain unaltered in time or are externally prescribed. Theoretical and numerical calculations were carried out to study the collision between a moving particle and a boundary particle. The boundaries were observed to behave in an elastic manner in absence of viscosity. They allow the fluid particles to approach till a critical distance depending on the energy of the incident particle. In addition, a dam break confined in a box was used to check the validity of the approach. The good agreement between experiments and numerical results shows the reliability of DBPs.
ISSN:1546-2218
1546-2226
DOI:10.3970/cmc.2007.005.173