An efficient algorithm for the detection of neighbouring particles: Prediction of the behaviour of a bubbling fluidised bed

Matteo Chiesa, Jens A. Melheim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An efficient algorithm for particle-particle and particle-wall collision detection in the two-dimensional case is briefly presented. The algorithm ensures an efficient computation of colliding particle flows. The physical domain is hierarchically divided and structured as a quad-tree. The algorithm is intended for particle-laden flows, which require small time steps, but within each time step, the algorithm is event-driven. The algorithm is used here to study the flow behaviour of a laboratory-scale fluidised bed. The two-dimensional motion of each individual spherical particle is directed, calculated from the forces acting on it, accounting for the interaction between the particle and the gas phase. The soft sphere model is used in the present work. The contact forces are continuous and finite and are a function of the deformations of the particles. A comparison of experimental observations and computational results of a two-dimensional laboratory-scale bubbling fluidised bed is presented and discussed.

Original languageBritish English
Title of host publication3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
Pages960-963
Number of pages4
StatePublished - 2005
Event3rd M.I.T. Conference on Computational Fluid and Solid Mechanics - Boston, MA, United States
Duration: 14 Jun 200517 Jun 2005

Publication series

Name3rd M.I.T. Conference on Computational Fluid and Solid Mechanics

Conference

Conference3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
Country/TerritoryUnited States
CityBoston, MA
Period14/06/0517/06/05

Keywords

  • Cell structure
  • Contacts detection algorithm
  • Discrete element method
  • Particle-laden flow
  • Quad-tree
  • Soft sphere dynamics

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