Mathematical modeling of heat transfer to a cylindrical solid immersed in a fluidized bed of small particles

Abstract

The effect of heat carriers on heat transfer to a cylindrical metal bar was investigated theoretically. The usual models for wall heat transfer in fluidized beds was extended for heat transfer to an immersed cylinder in a fluidized bed by considering the physical properties of the heat carriers in the thermal diffusivity of the emulsion layer. The heat transfer coefficient predicted by film penetration theory was acceptable and the predictions of model had good agreement with experimental data. It was found that heat carriers with high thermal conductivity and low specific heat can enhance the heat transfer rate more than carriers with low thermal conductivity and high specific heat. Copyright © 2009 Begell House, Inc.