Simultaneous Measurement of Motion and Temperature of Individual Particles in Fluidized Bed with Heat Transfer

Abstract

  Fluidized beds are widely used in industrial processes concerned with heat transfer. Different heat transfer mechanisms, such as heat convection between particle and surrounding flow, heat conduction between particle-particle and particle-wall and heat radiation, exist inside of the beds. Each particle has a finite heat capacity and convective and diffusive motion of particle also contribute to the heat transfer in the beds. For the better understandings of heat transfer occurs in fluidized beds, therefore, it is important to know the motion of particles in the particle level. In the present study, a new measurement technique based on the combination of PTV and IR thermography, which enables the simultaneous measurement of motion and temperature of individual particles, is developed and the technique is applied to the flow in a two-dimensional fluidized bed under a spouting condition.