experimental & simulation investigation of gas-solid tapered fluidized beds

Solids mixing plays an important role in the design and operation of fluidized beds# including raw material mixing, heat and mass transfer and chemical reaction rates in different parts of bed over time# the mixing mechanism and dynamics affect product uniformity, especially in the granular materials industry# therefore detailed information of mixing is essential for process optimization and equipment upgrading# present study, investigated solids mixing in semi two-dimensional fluid bed by eulerian-lagrangian approach using mfix software and quantified by mixing index# the results showed that with increasing mass fraction of larger particles, umf increases# the mixing index increases with the inlet gas velocity but we have an equilibrium state in each velocity#