Validation of CFD models for mono- and polydisperse air–water two-phase flows in pipes

Frank, Th.; Zwart, P. J.; Krepper, Eckhard; Prasser, H.-M.; Lucas, Dirk

doi:10.1016/j.nucengdes.2007.02.056

Cited by 195 publications

(83 citation statements)

References 4 publications

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“…Large eddy simulations (LES, [425]) of bubbly flows require a mesh size within both a higher and a lower bound in order to get a proper filter cut-off [426,427]. Conversely, RANS (Reynolds-averaged Navier-Stokes) simulations are less restrictive on the mesh size [10,414,420,[428][429][430]. Besides the numerical aspects, proper turbulence modeling is important for the accuracy of the simulations; multi-phase turbulence models are derived from their single-phase equivalents and terms modeling inter-phase interactions are added to the transport equations of the turbulence model (see refs.…”

Section: The Eulerian Multi-fluid Approachmentioning

confidence: 99%

Two-Phase Bubble Columns: A Comprehensive Review

2018

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We present a comprehensive literature review on the two-phase bubble column; in this review we deeply analyze the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer phenomena. First, we discuss the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer. We also discuss how the operating parameters (i.e., pressure, temperature, and gas and liquid flow rates), the operating modes (i.e., the co-current, the counter-current and the batch modes), the liquid and gas phase properties, and the design parameters (i.e., gas sparger design, column diameter and aspect ratio) influence the flow regime transitions and the fluid dynamics parameters. Secondly, we present the experimental techniques for studying the global and local fluid dynamic properties. Finally, we present the modeling approaches to study the global and local bubble column fluid dynamics, and we outline the major issues to be solved in future studies.

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Section: The Eulerian Multi-fluid Approachmentioning

confidence: 99%

Two-Phase Bubble Columns: A Comprehensive Review

2018

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“…In this work, Frank's wall lubrication force model (Frank et al, 2008) is used, which is based on Tomiyama's wall lubrication force model (Tomiyama, 1998).…”

Section: Interphase Momentum Transfer Modelsmentioning

confidence: 99%

“…Several aspects still challenge the CFD simulation methods that have been used to simulate gas-liquid two phase flow in stirred tank reactors. Among them are turbulence models with moderate accuracy and applicable for stirred tank reactor simulations (Murthy and Joshi, 2008;Singh et al, 2011), interphase drag and non-drag force models for dealing with momentum transfer between the two phases (Clift et al, 1978;Drew et al, 1979;Ishii and Zuber, 1979;Brucato et al, 1998;Tomiyama, 1998;Frank et al, 2008), population balance models with accurate breakup and coalescence models (Luo and Svendsen, 1996;Prince and Blanch, 1990), and proper interphase mass transfer models for engineering usage (Linek et al, 2005;Ranganathan and Sivaraman, 2011). Many excellent works have been done on evaluating different turbulent models, and comprehensive study can be found in Joshi et al (2011), thus it will be not the focus of this work.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Average and Local Gas–Liquid Flow Properties in Stirred Tank Reactors with Multiple Rushton Impellers

Pan

Xie

et al. 2017

J. Chem. Eng. Japan / JCEJ

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In this article, computational investigation of the gas-liquid ow in stirred tank with multiple Rushton impellers was carried out. Experimental results of average and local details of gas-liquid ow characters were reported, including gas-holdup, bubble Sauter diameter, speci c area and mass transfer coe cient. Thoroughly interphase momentum transfer models including drag and non-drag models were investigated, together with four mass transfer coe cient models using commercial CFD software ANSYS CFX 12.0. Among the drag models tested, the modi ed Brucato model showed more accurate results than others, while non-drag models showed slight e ects on the average ow and local ow characters. For accurate local ow simulation, the population balance model (PBM) showed quite sensitive e ect on the local gas distribution. Simulation of interphase mass transfer with eddy cell model showed the most agreement with experimental measured data. Additionally, two advection schemes were employed and compared with each other to test their ability to get more accurate simulation result.

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“…This method is based on the division of bubbles into two or more velocity groups, which behave like separate phases with their own velocity fields. These are then further subdivided into size groups (Frank et al, 2008).…”

Section: Population Balance Modelmentioning

confidence: 99%

CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model

Kálal¹,

Jahoda²,

Fořt³

2014

Chemical and Process Engineering

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The main topic of this study is the experimental measurement and mathematical modelling of global gas hold-up and bubble size distribution in an aerated stirred vessel using the population balance method. The air-water system consisted of a mixing tank of diameter T = 0.29 m, which was equipped with a six-bladed Rushton turbine. Calculations were performed with CFD software CFX 14.5. Turbulent quantities were predicted using the standard k-ε turbulence model. Coalescence and breakup of bubbles were modelled using the homogeneous MUSIG method with 24 bubble size groups. To achieve a better prediction of the turbulent quantities, simulations were performed with much finer meshes than those that have been adopted so far for bubble size distribution modelling. Several different drag coefficient correlations were implemented in the solver, and their influence on the results was studied. Turbulent drag correction to reduce the bubble slip velocity proved to be essential to achieve agreement of the simulated gas distribution with experiments. To model the disintegration of bubbles, the widely adopted breakup model by Luo & Svendsen was used. However, its applicability was questioned.

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Validation of CFD models for mono- and polydisperse air–water two-phase flows in pipes

Cited by 195 publications

References 4 publications

Two-Phase Bubble Columns: A Comprehensive Review

Two-Phase Bubble Columns: A Comprehensive Review

CFD Simulation of Average and Local Gas–Liquid Flow Properties in Stirred Tank Reactors with Multiple Rushton Impellers

CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model

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