Hydrodynamic performance evaluation of a novel eductor liquid–liquid extractor using CFD modeling

Hosseinzadeh, Mostafa; Ghaemi, Ahad; Shirvani, Mansour

doi:10.1016/j.cherd.2017.08.006

Cited by 9 publications

(19 citation statements)

References 53 publications

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“…It can be concluded in Figure 1 that the lighter dispersed phase flows in a jet stream type into the venturi, while sucking some amount of the heavy phase (continuous phase) into the venturi, as a recycling flow. The geometrical details of the device are reported in the previous work 24 …”

Section: Methodsmentioning

confidence: 99%

“…It includes a venturi in front of the flow exiting from a nozzle, both submerged in the liquids inside the column. Hosseinzadeh et al 24 presented an eductor LLE device and investigated hydrodynamic performance using computational fluid dynamics (CFD) modeling. Also, the mean drop size and drop size distribution were studied and correlated for water/toluene system in this extractor 25 …”

Section: Introductionmentioning

confidence: 99%

“…Here, the mass transfer performance of the eductor LLE device is studied by dimensional modeling and RSM. Also, our previous hydrodynamic studies on this device, including CFD and drop size investigations, 24,25 are used for evaluating the mass transfer performance of this type of extractor.…”

Section: Introductionmentioning

confidence: 99%

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Mass transfer study in eductor liquid–liquid extractor: Dimensional analysis and response surface methodology modeling

Hosseinzadeh

Shirvani

Ghaemi

et al. 2020

Asia-Pacific J Chem Eng

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In this work, the mass transfer performance of a new eductor liquid–liquid extractor is investigated experimentally and modeled by dimensional analysis and response surface methodology (RSM) with the utilization of water/acetic acid/toluene system. A correlation is derived for the overall mass transfer coefficient versus the Reynolds number, throat to nozzle area ratio, projection ratio, and the two phases of flow rates ratio. Based on the obtained results, the Reynolds number is known as the most effective parameter. Also, different hydrodynamic and geometrical parameters, giving the same Sauter mean diameter, have different mass transfer coefficients due to differences in droplet size distribution. In addition, the RSM studies show that the effects of the parameters are in the order of the two phases of flow rates ratio, the venturi throat to nozzle tip distance, nozzle diameter, and venturi throat diameter. The maximum overall mass transfer coefficient obtained equals to 0.000278 m/s for the studied system.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mass transfer study in eductor liquid–liquid extractor: Dimensional analysis and response surface methodology modeling

Hosseinzadeh

Shirvani

Ghaemi

et al. 2020

Asia-Pacific J Chem Eng

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“…According to Launder and Spalding [26] recommended values, the constants in above models are equal to the numerical values below [27]:…”

Section: Two-fluid Modelmentioning

confidence: 99%

CFD-PBM Coupled Simulation of Liquid-Liquid Dispersions in Spray Fluidized Bed Extractor: Comparison of Three Numerical Methods

Zheng

Zou

Peng

et al. 2019

International Journal of Chemical Engineering

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A coupled numerical code of the Euler-Euler model and the population balance model (PBM) of the liquid-liquid dispersions in a spray fluidized bed extractor (SFBE) has been performed to investigate the hydrodynamic behavior. A classes method (CM) and two representatively numerical moment-based methods, namely, a quadrature method of moments (QMOM) and a direct quadrature method of moments (DQMOM), are used to solve the PBE for evaluating the effect of the numerical method. The purpose of this article is to compare the results achieved by three methods for solving population balance during liquid-liquid two-phase mixing in a SFBE. The predicted results reveal that the CM has the advantage of computing the droplet size distribution (DSD) directly, but it is computationally expensive if a large number of intervals are needed. The MOMs (QMOM and DQMOM) are preferable to coupling the PBE solution with CFD codes for liquid-liquid dispersions simulations due to their easy application, reasonable accuracy, and high reliability. Comparative results demonstrated the suitability of the DQMOM for modeling the spray fluidized bed extractor with simultaneous droplet breakage and aggregation. This work increases the understanding of the chemical engineering characteristics of multiphase systems and provides a theoretical basis for the quantitative design, scale-up, and optimization of multiphase devices.

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“…For mixing flows, the homogeneous mixture of air-biogas in a Venturi mixture was simulated by Chandekar and Debnath [22], and they found that the Venturi mixture is effective to provide homogeneous mixture at the outlet section under all substitution levels. Hosseinzadeh et al [23] performed numerical studies on the liquid-liquid mixing in a Venturi mixing device and showed that the mixing efficiency and the mixing energy efficiency increase with the increases of the ratio of column diameter to nozzle diameter. Jensen et al [10] adopted the SST k-ω turbulence model to study the influence of gas-liquid flow ratio and Venturi geometrical parameters on the gas-liquid mixing.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Inflow Swirl on Cavitating and Mixing Processes in a Venturi Tube

Shi

Nikrityuk

2020

Fluids

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A study of the mixing flows (Schmidt number = 103) in a cavitating Venturi tube that feature linear and swirling flows is presented in this paper. The Large Eddy Simulation (LES) turbulence model, the Schnerr–Sauer cavitation model, and the mixture multiphase model, as implemented in the commercial CFD ANSYS FLUENT 16.2, were employed. The main emphasis is spending on the influence of different inlet swirling ratios on the generation of cavitation and mixing behaviors in a Venturi tube. Four different inflow regimes were investigated for the Reynolds number Re = 19,044, 19,250, 19,622, 21,276: zero swirl, 15% swirl, 25% swirl and 50% swirl velocity relative to the transverse inflow velocity, respectively. The computed velocity and pressure profiles were shown in good agreement with the experiment data from the literature. The predicted results indicate that the imposed swirl flow moves the cavitation bubbles away from throat surfaces toward the throat axis. The rapid mixing between two volumetric components is promoted in the divergent section when the intense swirl is introduced. Additionally, the increase in the swirl ratio from 0.15 to 0.5 leads to a linear increase in the static pressure drop and a nonlinear increase in the vapor production. The reduction in the fluid viscosity ratio from μ2μ1=10 to μ2μ1=1 generates a high cavitation intensity in the throat of the Venturi tube. However, the changes in the pressure drop and vapor volume fraction are significantly small of pure water flow.

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Hydrodynamic performance evaluation of a novel eductor liquid–liquid extractor using CFD modeling

Cited by 9 publications

References 53 publications

Mass transfer study in eductor liquid–liquid extractor: Dimensional analysis and response surface methodology modeling

Mass transfer study in eductor liquid–liquid extractor: Dimensional analysis and response surface methodology modeling

CFD-PBM Coupled Simulation of Liquid-Liquid Dispersions in Spray Fluidized Bed Extractor: Comparison of Three Numerical Methods

The Influence of Inflow Swirl on Cavitating and Mixing Processes in a Venturi Tube

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