Heat transfer in pulse-stabilized fluidization – Part 1: overall cylinder and average local analyses

The present study examines the effect of an opposing oscillatory flow on heat transfer from an immersed horizontal cylinder in a bubbling gas-fluidized bed. This opposing oscillatory flow creates a state of fluidization termed pulse-stabilized fluidization. Heat transfer rates were measured for a monodisperse distribution of particles for fluidization ratios ranging from 1.1 to 2.7. Overall heat transfer measurements from a submerged horizontal cylinder show that the heat transfer characteristics are significantly altered by an opposing oscillatory flow. A modified form of the Strouhal number effectively characterizes the particle Nusselt number. Time-averaged local heat flux measurements showed that the local heat transfer distribution was altered by the hydrodynamics induced by the opposing oscillatory flow.