Numerical simulation of the combustion process of a pellet-drop-feed boiler

M. A. Gómez*, J. Porteiro, Daniel De la Cuesta de Cal, D. Patiño, J. L. Míguez

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

54 Citations (Scopus)


This paper presents a transient model for the simulation of biomass combustion in a fixed bed boiler fed through particle drop. The method combines classical CFD techniques, which are used to simulate the gas phase, with a set of Eulerian variables defined to model the solid phase and Lagrangian trajectories that model the particle drop. Several submodels are implemented to simulate the numerous processes that occur during the combustion of the solid phase. These submodels include the thermal conversion of biomass, heat and mass transfer, particle shrinkage and bed compaction as well as the interaction of the DPM (Discrete Phase Model) trajectories and the bed variables. The predictions are contrasted with various experimental tests, which provide reasonably good results and demonstrate the overall good behavior of the models. The simulation facilitates an understanding of the heat transfer inside the boiler and the instability of the emission measurements.

Original languageEnglish
Pages (from-to)987-999
Number of pages13
Publication statusPublished - 2016
Externally publishedYes


  • Biomass
  • Boiler
  • CFD
  • Combustion
  • Feeding


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