Development of Numerical Model for Drying Behavior of Particles

Abstract

Fluidized bed is widely used in the processes related to heat and mass transfers such as drying, combustion and gasification. It is not trivial to observe these transport phenomena occurring inside of the beds experimentally and the promotion of our understandings on internal transport processes by numerical simulation is important. In the present study, extension of DEM-CFD mesoscopic model to be able to consider heat and mass transfers was conducted. We especially focused on drying process of wet particles in hot fluidized bed. By comparing the results of drying experiment using wet Silica-gel particles and the proposed model, validity of the model was successfully demonstrated; the proposed model enables quantitative prediction of the drying process with acceptable level.