Boundary conditions generated by dynamic particles in SPH methods

A. J C Crespo*, M. Gómez-Gesteira, R. A. Dalrymple

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

402 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)173-184
Number of pages12
JournalComputers, Materials and Continua
Issue number3
StatePublished - Jun 18 2007


  • Boundary conditions
  • Meshfree methods
  • Smoothed particle hydrodynamics
  • SPH

ASJC Scopus subject areas

  • Biomaterials
  • Modeling and Simulation
  • Mechanics of Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering


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