Heat exchange of dynamic powder beds with a heat-transfer surface. II. A dust-laden gas flow

Heat exchange of a dust-laden gas flow with the wall of a cylindrical channel in laminar and laminar-to-turbulent transitional regimes of gaseous-phase motion is studied experimentally. Corundum with a particle size of 40 μm was used as the solid phase while air was used as the carrier gas. Experimental values of the heat-transfer coefficient are obtained and approximate dependences for the Nu number are proposed.