Characterization of sand particles in a bubbling fluidized bed with diverging riser

Experimental investigation on heat transfer in a gas-solid fluidized bed with a bundle of heat exchanging tubes

“…As superficial gas velocity rose, maximum heat transfer coefficients were obtained at each radial position. Thus heat transfer coefficients with radial profiles were almost uniform [20,[37][38][39].…”

“…In contrast, the region along the walls tends to change from a dense layer of downward-moving gas and particle combination. As the velocity increases, both regions gradually transform into a structure dominated by rapidly moving particles suspended in a flow of aggressively mixing turbulent particles throughout the column [36,38,[45][46][47].…”

Experimental Investigation and CFD–DEM Simulation of Solids Mixing in Tapered Fluidized Beds

“…In comparison to a nontapered geometry, their findings indicated a 10−20% increase in heat transfer. Das et al 17 similarly investigated the gas−solid flow and heat-transfer behavior, utilizing the Eulerian−Eulerian approach that integrated the kinetic theory of granular flow (KTGF) in the diverging riser. They noted that the lower pressure drops along the conical riser led to improved mixing of particles and gases compared to the columnar riser.…”

Numerical simulation of homogeneous fluidization behaviour of Geldart Group A particles in gas tapered fluidized beds

“…[1,2] Indeed, they have various applications in the chemical, pharmaceutical, and mineral industries due to their desired heat and mass transfer rates and increased surface area contact between solid particles and the fluid phase. [3][4][5] The technological potential of fluidized beds for environmental protection of heat-sensitive products such as enzymes, proteins, or microorganisms is also well known. [6] Most previous studies have focused on cylindrical fluidized bed configurations with a constant cross-section.…”