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A boundary‐layer model of fluid‐particle mass transfer in fixed beds
Author(s) -
Carberry James J.
Publication year - 1960
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.690060323
Subject(s) - mass transfer , boundary layer , reynolds number , exponent , particle (ecology) , diffusion , mechanics , thermodynamics , schmidt number , boundary (topology) , physics , mathematics , mathematical analysis , turbulence , geology , philosophy , linguistics , oceanography
The process of fluid‐particle mass transfer in fixed beds at Reynolds numbers less than 1,000 is viewed in terms of transient molecular diffusion within a boundary layer which is developed and destroyed repeatedly as the fluid journeys through the bed. Literature data support the j factor derived from the premises of the model. The theory predicts a Schmidt number exponent of 2/3 for N Sc ≧ 1; however this exponent should approach 1/2 for N Sc < 1.