Bed Voidage and Heat Transfer in Non-Newtonian Liquid-Solid Fluidized Bed

The presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. the aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coefficient for solid-liquid fluidization in a cylindrical tube and to study the effect of process parameters such as particle size and density, flow velocity, and liquid viscosity on these subjects. a large number of experiments were performed using different cylindrical and spherical particles fluidized in aqueous cmc solution with different concentrations. using the experimental results, a new correlation for predicting heat transfer coefficient in non-newtonian liquid-solid fluidized bed heat exchanger was introduced.