Experimental study on heat transfer characteristics between particle flow and wall.

This study experimentally and numerically investigated the characteristics of heat transfer between particle flow and a cylindrical wall. The theoretical model of the heat transfer coefficient calculation was verified and modified according to experimental data. In the experimental scheme, the temperature at the axis of the cylinder under different conditions was measured to determine the effects of temperature, relative motion velocity, and cylinder diameter on the heat transfer coefficient between the particle flow and the cylindrical wall. Results revealed the benefits of using high temperature for increasing the heat transfer coefficient. The relative motion velocity between the wall and particles had no significant effect on the heat transfer coefficient. Furthermore, the change in the heat transfer coefficient was less than 10% in the range of relative velocity v = 0.03 to 0.12 m·s⁻¹ between the wall and particles. The heat transfer coefficient almost independents on cylinder diameter under constant particle diameter conditions. [ABSTRACT FROM AUTHOR]