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Population Balance Equation of Cohesive Particle Flow in a Circulating Fluidized Bed
Author(s) -
Sun Liyan,
Luo Kun,
Fan Jianren
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600711
Subject(s) - mechanics , agglomerate , viscosity , population balance equation , population , fluidized bed , volume fraction , fluidized bed combustion , particle (ecology) , flow (mathematics) , thermodynamics , pressure gradient , materials science , mass flux , physics , geology , composite material , oceanography , demography , sociology
A novel model coupled with a population balance equation is adopted for simulating the aggregation process and flow behavior of cohesive powders in a full‐loop circulating fluidized bed. The agglomerate diameter is calculated according to the change of particle number by a population balance equation which is solved as a part of computational fluid dynamics simulation. The solid pressure and viscosity are redefined by taking the effect of interparticle force into consideration based on the kinetic theory of granular flow. Simulation results of time‐averaged solid volume fraction and diameter of agglomerate are predicted by a numerical method and are in reasonable agreement with experimental data. The variation of mass flux, solid pressure, and viscosity under different operating conditions are analyzed based on the proposed model.