Hydrodynamics and simulation of air–water homogeneous bubble column under elevated pressure |
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Authors: | Bay V Tran Dan D Nguyen Son I Ngo Young-Il Lim Bongjun Kim Dong Hyun Lee Kang-Seok Go Nam-Sun Nho |
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Affiliation: | 1. CoSPE, Department of Chemical Engineering, Hankyong National University, Anseong-si, Republic of Korea;2. School of Chemical Engineering, Sungkyunkwan University, Suwon, Republic of Korea;3. Center for Convergent Chemical Process (CCP), Daejeon, Republic of Korea |
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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. |
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Keywords: | air–water bubble column computational fluid dynamics elevated pressure homogeneous bubbly regime population balance equation |
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