Abstract
Two mathematical models are proposed to represent gas temperature distributions in suspension flows heated at the tube wall. These models are quite different from each other in the turbulent mixing mode of solid particles. Two parameters in these models were determined from experimental measurement of temperature distribution by using a parameter estimation technique. These models express observed temperature distributions well, especially when the loading ratio is smaller than unity. Mean gas eddy diffusivity and Nusselt number were calculated from these two parameters, which could be correlated well with a single nondimensional parameter that represents the operating conditions. By using this correlation and the models, temperature distributions can be easily predicted in the usual practical operating conditions of industrial suspension flows.
