TY  - EJOU
AU  - Crespo, A. J. C.  
AU  - Gómez-Gesteira, M.  
AU  - Dalrymple, R. A.  

TI  - Boundary Conditions Generated by Dynamic Particles in SPH Methods
T2  - Computers, Materials \& Continua

PY  - 2007
VL  - 5
IS  - 3
SN  - 1546-2226

AB  - 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.
KW  - Meshfree methods
KW  -  SPH
KW  -  smoothed particle hydrodynamics
KW  -  boundary conditions

DO  - 10.3970/cmc.2007.005.173