Abstract
Visualization of heat and flow was carried out to analyze the heat transfer between particles. The experimental data of heat transfer were classified by the mechanism of heat transfer, i. e. convection, conduction and contact. These values of heat transfer were compared with the values calculated with the previous estimation equations. The calculated contact heat transfer was poorly agreed with the experimental one. From the results, we reached that the model and equation for the contact heat transfer should be reestablished.
