Recent Development in Hydrodynamic and Heat Transfer Characteristics in the Three-phase Fluidized-bed System

Gas–liquid-solid fluidized beds are broadly utilized in the petrochemical, pharmaceutical, refining, food, biotechnology, and environmental industries. Due to complex phenomena, such as particle-particle, liquid-particle, particle-bubble interactions, hydrodynamics, heat transfer of three-phase (gas-liquid-solid) beds, they incompletely understood. The ability accurately predict essential characteristics fluidized-bed system, individual phase mixing, parameters, is necessary for its successful design operation. This paper investigates pressure drop, minimum fluidization velocity, holdup, heat-transfer coefficient a bed reactor, studies, CFD simulation, effect these parameters on extent fluidization. Many variables (fluid flow rate, particle density size, fluid inlet, height) affect fluidizing quality performance process. hydrodynamics mixing phases, behavior with various modes were investigated parameters. Several publications have demonstrated utility (CFD) explaining heat, mass beds. Principles measurement, details experimental configurations, applied techniques by researchers also presented. Feng's model was statistically validated using data that both time-averaged time-dependent. Furthermore, this successfully predicted instantaneous structures, which should provide strategies best design, scale-up, operation columns. divergence between simulated observed values can be reduced better understanding bed's nature.