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Collisional viscosity of FCC particles in a CFB
Author(s) -
Gidaspow Dimitri,
Huilin Lu
Publication year - 1996
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690420910
Subject(s) - dimensionless quantity , viscosity , particle (ecology) , mechanics , kinetic energy , kinetic theory , volume fraction , materials science , particle velocity , particle size , two phase flow , flow (mathematics) , physics , thermodynamics , classical mechanics , chemistry , geology , oceanography
Particle velocity distributions were measured for a flow of 75‐μm FCC particles in a CFB using a new video‐digital camera technique. From the spread of particle histograms, a random oscillating particle velocity was determined. This random velocity was used to compute the powder viscosity with the help of dense‐phase kinetic theory of granular flow. There was excellent agreement between this kinetic‐theory measurement and previous macroscopic viscosity measurements. The dimensionless group kinematic viscosity divided by the oscillating velocity and particle diameter correlated all available data as a function of particle volume fraction.