Hydrodynamic Study of Tapered Fluidized Bed and its Validation

Abstract

This research examines the hydrodynamics study of tapered fluidized bed of sand particles using sand particles on the fluent versionV18.0 platform. The drag model reviewed are Gidaspow, Hulin-Gidaspow, Syamlal O Brain, Gilabaro. Comparison between experimental data and simulated results have been made in the recent study. The results show that gidaspow drag model show similarity with experimental data. The other applied drag model highly overestimated the gas-solid momentum exchange results. Modified drag model gidaspow was also applied in which the drag factor with 0.9 show some similarity with experimental data. The results were compared with experimental data. other than modified gidaspow results, the change in solid frictional viscosity from Schaffer model to Johnson et al also showed some similarity with experimental data. In order to predict bubble size, diameter its expansion ratio fraction of fluidized area and volume fraction of the particle using homogeneous and heterogeneous drag models was calculated and compared with the experimental findings. Also, the flow structure, heterogeneous and homogeneous was observed while applying different drag models. On the basis of dimensional analysis, various correlations have also been developed while considering the parameters such as geometry of tapered bed, diameter of the particle, static bed height, density of solid particles and gas and superficial velocity of the fluidizing medium.