Coarse grained particle model and numerical simulation of fluidized bed with heat transfer

Abstract

In this paper, a coarse grained particle model with heat transfer was developed. Among multiphase flows, the fluidized bed is an important topic of engineering due to its wide range of application including environmental and chemical processing plants. When including the effect of heat transfer in the model, it is important to simulate the flow behavior of gas and powder together with their temperature changes. A DEM-CFD method together with the developed coarse grained particle model for heat transfer was adopted to simulate the cooling behavior of the fluidized bed with hot particles. The simulated average temperature of the particles was compared with experimental results as well as simulated results of the reference. It was found that the simulation results for models with and without the coarse grained particle model to be similar to those of the results of the reference model. From the simulation results, it was found that this coarse grained particle model is an effective method to simulate the heat transfer behavior in fluidized beds.