Grain sedimentation with SPH-DEM and its validation

Martin Robinson, Stefan Luding, Marco Ramaioli

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

3 Citations (Scopus)
87 Downloads (Pure)

Abstract

Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free surface flows or flow around complex and/or moving geometries. We use this method to simulate three different sedimentation test cases and compare the results to existing analytical solutions. The grain velocity in Single Particle Sedimentation compares well (< 2% error) with the analytical solution as long as the fluid resolution is coarser than two times the particle diameter. The multiple particle sedimentation problem and Rayleigh Taylor Instability (RTI) also perform well against the theory, but it was found that the method is susceptible to fluid velocity fluctuations in the presence of high porosity gradients. These fluctuations can be damped by the addition of a dissipation term, which has no effect on the terminal velocity but can lead to slower growth rates for the RTI.
Original languageEnglish
Title of host publicationPowders and Grains 2013
Subtitle of host publicationProceedings of the 7th International Conference on Micromechanics of Granular Media
EditorsAibing Yu, Kejun Dong, Runyu Yang, Stefan Luding
PublisherAIP Publishing LLC
Pages1079-1082
ISBN (Print)978-0-7354-1166-1
DOIs
Publication statusPublished - 8 Jul 2013
Event7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 - Sydney, Australia
Duration: 8 Jul 201312 Jul 2013
Conference number: 7
http://www.pg2013.unsw.edu.au/

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing LLC
Volume1542
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013
Abbreviated titlePowders &amp; Grains
CountryAustralia
CitySydney
Period8/07/1312/07/13
Internet address

Keywords

  • SPH
  • DEM
  • Fluid-particle flow
  • Discrete particle model
  • Sedimentation
  • Rayleigh-Taylor instability
  • PARDEM

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