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Prediction of gas hold‐up and liquid velocity in airlift reactors using two‐phase flow friction coefficients
Author(s) -
GarcíaCalvo Eloy,
Letón Pedro
Publication year - 1996
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199612)67:4<388::aid-jctb580>3.0.co;2-2
Subject(s) - airlift , mechanics , volume (thermodynamics) , newtonian fluid , flow (mathematics) , non newtonian fluid , range (aeronautics) , materials science , phase (matter) , friction factor , thermodynamics , two phase flow , volumetric flow rate , chemistry , physics , composite material , bioreactor , turbulence , organic chemistry , reynolds number
The overall friction coefficient ( K f ) of airlift reactors was estimated using equivalent lengths ( L eq ) and friction factors ( f ). The friction factor was calculated taking into account the riser liquid velocity profile corresponding to the two‐phase flow and using classical one‐phase equations. A previously described model was used to obtain simultaneously both gas hold‐up and liquid circulation velocity. The model simulates experimental data obtained in a wide range of configurations of internal (2 and 30 dm 3 volume) and external (from 8 to 600 dm 3 volume) airlift reactors with Newtonian (water and alcohol solutions) and non‐Newtonian (carboxymethylcellulose (CMC) solutions) systems. Com‐parison with other models from the literature yielded similar results.