Numerical investigation of a coarse-grain discrete element method in solid mixing in a spouted bed

Kazuya Takabatake, Yuki Mori, Johannes G. Khinast, Mikio Sakai

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We describe the effectiveness of the coarse-grain model of the discrete element method (DEM) in solid mixing in a spouted bed. The coarse-grain model was developed originally to simulate large-scale DEM simulations efficiently, where the coarse-grain particle represents a group of original particles. In previous studies, the adequacy of the coarse-grain model was proven in a pneumatic conveying system and bubbling fluidized beds through verification and validation tests. Namely, In this study, the coarse-grain model is applied to solid mixing in a spouted bed. Agreement of the mixing state is shown between an original particle system and coarse grain model systems. Subsequently, correlation between solid mixing and macroscopic behavior of the solid particles is examined in the present study. The macroscopic properties such as solid-particle spatial distribution, pressure drop and velocity distribution of the solid phase are confirmed to correspond quantitatively in the coarse-grain model and an original particle system. Finally, the calculation efficiency of the coarse-grain model is evaluated. Consequently, the coarse-grain model is shown to be able to efficiently investigate the solid mixing in a spouted bed.

Original languageEnglish
Pages (from-to)416-426
Number of pages11
JournalChemical Engineering Journal
Volume346
DOIs
Publication statusPublished - 15 Aug 2018

Fingerprint

discrete element method
Finite difference method
pressure drop
Conveying
Velocity distribution
Pneumatics
Fluidized beds
Spatial distribution
Pressure drop
spatial distribution
particle

Keywords

  • Coarse-grain model
  • DEM-CFD method
  • Discrete element method
  • Spouted bed

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Numerical investigation of a coarse-grain discrete element method in solid mixing in a spouted bed. / Takabatake, Kazuya; Mori, Yuki; Khinast, Johannes G.; Sakai, Mikio.

In: Chemical Engineering Journal, Vol. 346, 15.08.2018, p. 416-426.

Research output: Contribution to journalArticleResearchpeer-review

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