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The ratio of terminal velocity to minimum fluidising velocity for spherical particles
Author(s) -
Bourgeois P.,
Grenier P.
Publication year - 1968
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450460508
Subject(s) - terminal velocity , fluidization , terminal (telecommunication) , range (aeronautics) , mechanics , falling (accident) , particle (ecology) , physics , particle velocity , fluidized bed , thermodynamics , materials science , geology , engineering , composite material , medicine , telecommunications , oceanography , environmental health
The analogy between the states of a particle falling at its terminal velocity in a fluid and that of a particle in a bed, at incipient fluidization by the same fluid, suggests the possibility of a correlating minimum fluidizing and terminal velocities and of predicting the minimum fluidizing velocity. A semi‐theoretical curve has been obtained, relating ( Re t / Re mf ) to Fn = gp F (rH S – rH F ) d 3 /μ 2 and it has been compared with new experimental data collected for this purpose in the range 10 3 < Fn <10 8 . Analytical expressions for ( Re t / Re mf ) are proposed.