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Hydrodynamics and simulation of air–water homogeneous bubble column under elevated pressure
Author(s) -
Tran Bay V.,
Nguyen Dan D.,
Ngo Son I.,
Lim YoungIl,
Kim Bongjun,
Lee Dong Hyun,
Go KangSeok,
Nho NamSun
Publication year - 2019
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.16685
Subject(s) - bubble , mechanics , computational fluid dynamics , pressure drop , homogeneous , bubble point , thermodynamics , drop (telecommunication) , chemistry , materials science , physics , engineering , mechanical engineering
Abstract A gas–liquid Eulerian computational fluid dynamics (CFD) model coupled with a population balance equation (PBE) was presented to investigate hydrodynamics of an air–water bubble column (1.8 m in height and 0.1 m in inner diameter) under elevated pressure in terms of pressure drop, gas holdup, mean bubble size, and bubble surface area. The CFD‐PBE model was modified with three pressure correction factors to predict both the total gas holdup and the mean bubble size in the homogeneous bubbly flow regime. The three correction factors were optimized compared to experimental data. Increasing the pressure led to increasing the density, reducing the bubble size, and increasing the gas holdup. The bubble size distribution moved toward a smaller bubble size, as the pressure increased. The modified CFD‐PBE model validated with experimental data and empirical models represented well hydrodynamics of the bubble column at P = 0.1, 1.5, and 3.5 MPa.