Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model

Kenya Kuwagi, Toshihiro Takami, Azri Bin Alias, Degang Rong, Hiroshi Takeda, Shinichiro Yanase, Toshinori Kouchi, Toru Hyakutake, Kaoru Yokoyama, Yoshiyuki Ohara, Nobuo Takahashi, Noritake Sugitsue

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A simulation code based on the discrete element method (DEM) and computational fluid dynamics (CFD) coupling model was developed to simulate the behavior of radioactive cesium in waste incinerators. The waste lump was represented by particles in the simulation. The energy equation for a mixed gas, diffusion equation for each gas component, as well as the energy, drying, pyrolysis, and combustion equations for each particle were solved in the simulation by adding a combustion model to the standard DEM–CFD coupling model. The particle size of the waste changed as drying, pyrolysis, and combustion progressed. At the end of the combustion process, particle waste became ash, and the number of ash particles was enormous. To avoid an excessive computational load due to the high particle number, a similar assembly model was adopted to reduce the particle number in the calculation. There was a good agreement between the simulation and experimental results for the temperature at the outlet of the furnace and the flue gas composition.

Original languageEnglish
Pages (from-to)425-434
Number of pages10
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume49
Issue number5
DOIs
Publication statusPublished - Jan 1 2016

Keywords

  • Combustion
  • DEM–CFD simulation
  • Incinerator
  • Waste

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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