Convective heat transfer to rapidly flowing, granular materials

Convective heat transfer to a rapidly flowing, granular material is experimentally investigated over a flat plate in an inclined chute. Two different sizes of glass beads are used as the granular materials. A technique was developed to measure the average density of the flowing material, which allowed the more accurate determination of the average velocity as well as of parameters depending on the velocity. The results are presented in terms of the Nusselt number and a model is proposed relating this Nusselt number to a Péclet number and a Froude number. The predicted results of the model are compared with the experimental data.