CFD simulation of hydrodynamics in a high-pressure bubble column using three optimized drag models of bubble swarm

Ping, Yan; Jin, Haibo; He, Guangping; Guo, Xiaoyan; Ma, Lu‐Fang; Yang, Suohe; Zhang, Rongyue

doi:10.1016/j.ces.2019.01.019

“…CFD makes it possible to understand complex hydrodynamic behaviors with heat and mass transfer and chemical reactions. CFD has numerous applications in the field of gas distributors [24], gas storage tanks [26], coal and biomass gasifiers [55,70], fuel cells [38,71], absorbers with random packing [72][73][74] and structured-packing [54,75], agitated bioreactors [39,76], offshore oil separators [77], gas-liquid bubble columns [32,53,[78][79][80], and gas-solid fluidized beds [23,43,55,56,58,65].…”

Section: Applications Of Eulerian Cfdmentioning

confidence: 99%

Computational Fluid Dynamics (CFD) of Chemical Processes

2021

0

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“…CFD makes it possible to understand complex hydrodynamic behaviors with heat and mass transfer and chemical reactions. CFD has numerous applications in the field of gas distributors [24], gas storage tanks [26], coal and biomass gasifiers [55,70], fuel cells [38,71], absorbers with random packing [72][73][74] and structured-packing [54,75], agitated bioreactors [39,76], offshore oil separators [77], gas-liquid bubble columns [32,53,[78][79][80], and gas-solid fluidized beds [23,43,55,56,58,65].…”

Section: Applications Of Eulerian Cfdmentioning

confidence: 99%

“…CFD simulations in the gas-liquid phase have been applied to chemical and biological processes such as fuel cells [38,86], microchannel reactors [87], WWTPs [39], photobioreactors [76], absorbers with structured-packing [54,75] and random packing [74], and bubble columns [53,[78][79][80]. VOF-CFD was used to simulate relatively small physical domains, whereas EM-CFD was used to investigate the hydrodynamic behaviors of an entire process.…”

Section: Gas-liquid Phase Cfd Simulationsmentioning

confidence: 99%

“…Yan et al (2019) [80] proposed three drag models used for a gas-liquid transient Eulerian CFD model without PBE in an air-water bubble column under elevated pressure. The drag models covering the flow regime from homogeneous to turbulent included a pressure correction term to represent the effect of pressure on the gas holdup [80]. Gas-organic liquid bubble columns at high pressures and temperatures are common in industrial applications [89], therefore attention has been paid to the CFD simulation of those bubble columns.…”

Section: Chemengineering 2020 4 X For Peer Review 13 Of 26mentioning

confidence: 99%

“…Gas holdup contours in air-water homogeneous bubble column at 1-35 bar (modified from Tran et al (2019) [53]).Yan et al (2019)[80] proposed three drag models used for a gas-liquid transient Eulerian CFD model without PBE in an air-water bubble column under elevated pressure. The drag models covering the flow regime from homogeneous to turbulent included a pressure correction term to represent the effect of pressure on the gas holdup[80]. Gas-organic liquid bubble columns at high…”

mentioning

confidence: 99%

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Multiscale Eulerian CFD of Chemical Processes: A Review

Ngo

¹

,

Lim

²

2020

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This review covers the scope of multiscale computational fluid dynamics (CFD), laying the framework for studying hydrodynamics with and without chemical reactions in single and multiple phases regarded as continuum fluids. The molecular, coarse-grained particle, and meso-scale dynamics at the individual scale are excluded in this review. Scoping single-scale Eulerian CFD approaches, the necessity of multiscale CFD is highlighted. First, the Eulerian CFD theory, including the governing and turbulence equations, is described for single and multiple phases. The Reynolds-averaged Navier–Stokes (RANS)-based turbulence model such as the standard k-ε equation is briefly presented, which is commonly used for industrial flow conditions. Following the general CFD theories based on the first-principle laws, a multiscale CFD strategy interacting between micro- and macroscale domains is introduced. Next, the applications of single-scale CFD are presented for chemical and biological processes such as gas distributors, combustors, gas storage tanks, bioreactors, fuel cells, random- and structured-packing columns, gas-liquid bubble columns, and gas-solid and gas-liquid-solid fluidized beds. Several multiscale simulations coupled with Eulerian CFD are reported, focusing on the coupling strategy between two scales. Finally, challenges to multiscale CFD simulations are discussed. The need for experimental validation of CFD results is also presented to lay the groundwork for digital twins supported by CFD. This review culminates in conclusions and perspectives of multiscale CFD.

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Hydrodynamics and simulation of air–water homogeneous bubble column under elevated pressure

Tran

¹

,

Nguyen

²

,

Ngo

³

et al. 2019

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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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CFD simulation of hydrodynamics in a high-pressure bubble column using three optimized drag models of bubble swarm

Cited by 35 publications

References 46 publications

Computational Fluid Dynamics (CFD) of Chemical Processes

Computational Fluid Dynamics (CFD) of Chemical Processes

Multiscale Eulerian CFD of Chemical Processes: A Review

Hydrodynamics and simulation of air–water homogeneous bubble column under elevated pressure

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