Transient CFD simulation of wood log combustion in stoves

Robert Scharler*, Thomas Gruber, Armin Ehrenhöfer, Joachim Kelz, Ramin Mehrabian Bardar, Thomas Bauer, Christoph Hochenauer, Andrés Anca-Couce

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Wood log stoves are a common residential heating technology that produce comparably high pollutant emissions. Within this work, a detailed CFD model for transient wood log combustion in stoves was developed, as a basis for its optimization. A single particle conversion model previously developed by the authors for the combustion of thermally thick biomass particles, i.e. wood logs, was linked with CFD models for flow and turbulence, heat transfer and gas combustion. The sub-models were selected based on a sensitivity analysis and combined into an overall stove model, which was then validated by simulations of experiments with a typical wood log stove, including emission measurements. The comparison with experimental results shows a good accuracy regarding flue gas temperature as well as CO2 and O2 flue gas concentrations. Moreover, the characteristic behavior of CO emissions could be described, with higher emissions during the ignition and burnout phases. A reasonable accuracy is obtained for CO emissions except for the ignition phase, which can be attributed to model simplifications and the stochastic nature of stove operation. Concluding, the CFD model allows a transient simulation of a stove batch for the first time and hence, is a valuable tool for process optimization.

Original languageEnglish
Pages (from-to)651-662
Number of pages12
JournalRenewable Energy
Publication statusPublished - 1 Jan 2020


  • CFD simulation
  • Combustion
  • Experimental validation
  • Stove
  • Transient model
  • Wood log

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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