Abstract
We are developing a new combustion simulation technique that couples Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM) to accurately understand the unsteady combustion phenomena inside a stoker-type waste incinerator. The new simulation reproduces the detailed combustion phenomena throughout the furnace by mutually coupling the analysis results of the unsteady waste transport behavior and solid-gas reactions by DEM with the gas-phase combustion analysis results by CFD. In this report, we derived the particle parameters of the waste in the DEM from the angle of repose data obtained from the experiment and verified that these parameters can be used to reproduce the waste transport behavior in the DEM simulation. Additionally, we verified that the solid-gas reaction behavior of the waste can be analyzed by DEM-CFD coupling simulation. Furthermore, we conducted DEM-CFD coupling simulation of the overall incinerator, the transport behavior of the waste and the solid-gas reactions were analyzed simultaneously. In the future, we plan to conduct a DEM-CFD coupling simulation of the overall incinerator, including the interaction with gas-phase combustion reactions and solid-phase behavior.
