Bubbly flow with particle attachment and detachment – A multi-phase CFD study

Sarhan, A.R.; Naser, Jamal; Brooks, Geoffrey

doi:10.1080/01496395.2017.1375525

Cited by 33 publications

(17 citation statements)

References 54 publications

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“…Matte droplets in the continuous slag phase remain suspended either due to higher viscosity of slag, formation of Fe3O4 crystallization structure, gas carrying some of the small droplets from the matte phase, or lower diameter of matte droplets, as it is concluded by [17,25,26] that small matte droplets of size 100 µm remain suspended in the slag phase. In the above three cases effects of matte droplets' size was solely consider to study the settling phenomena.…”

Section: Comparison Of Settling Velocities and Copper Losses With Litmentioning

confidence: 99%

Dynamic Modelling of Molten Slag-Matte Interactions in an Industrial Flash Smelting Furnace Settler

Khan

Jokilaakso

2018

The Minerals, Metals &Amp; Materials Series

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Depleting copper resources and advancing technologies have challenged industries to develop more viable, adaptable and cost efficient processes using also secondary raw materials in copper production. This study is targeting to that goal by dynamic modelling of flow and heat transfer coupled with chemical kinetics in an industrial scale flash smelting furnace settler using commercial CFD software ANSYS Fluent. First, different physical phenomena occurring inside the settler, for example, settling and separation of the matte/slag phases, and heat transfer between slag/matte phases and settler walls are studied. Secondly, reaction kinetics between matte and slag, and between slag/matte and settler walls, and impurity element distribution will be studied. This would also include phase changes phenomena due to these reactions and the flow of the reaction gases inside the settler. Settling of polydispersed droplets, their coagulation, breakage, and WEEE particle behavior are further targets of the modelling work.

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Section: Comparison Of Settling Velocities and Copper Losses With Litmentioning

confidence: 99%

Dynamic Modelling of Molten Slag-Matte Interactions in an Industrial Flash Smelting Furnace Settler

Khan

Jokilaakso

2018

The Minerals, Metals &Amp; Materials Series

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“…Compared to gas–liquid bubble column, gas–liquid airlift reactor or gas–liquid JLR, the introduction of solids into the gas–liquid system increases the complexity of dynamic properties among phases, both at the macroscale and mesoscale. Further, the effect of solids on flow hydrodynamics is still under controversy for slurry bubble columns, as well as for three‐phase JLRs.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on multiscale hydrodynamics in a novel gas–Liquid–Solid three phase jet‐Loop reactor

Gao

et al. 2019

AIChE Journal

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Multiphase flow hydrodynamics in a novel gas–liquid–solid jet‐loop reactor (JLR) were experimentally investigated at the macroscales and mesoscales. The chord length distribution was measured by an optical fiber probe and transformed for bubble size distribution through the maximum entropy method. The impacts of key operating conditions (superficial gas and liquid velocity, solid loading) on hydrodynamics at different axial and radial locations were comprehensively investigated. JLR was found to have good solid suspension ability owing to the internal circulation of bubbles and liquid flow. The gas holdup, axial liquid velocity, and bubble velocity increase with gas velocity, while liquid velocity has little influence on them. Compared with the gas–liquid JLRs, solids decrease the gas holdup and liquid circulation, reduces the bubble velocity and delays the flow development due to the enhanced interaction between bubbles and particles (Stokes number >1). This work also provides a benchmark data for computational fluid dynamics (CFD) model validation. © 2019 American Institute of Chemical Engineers AIChE J, 65: e16537, 2019

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“…Other researches , have been done on the different interphase momentum exchanges between slurry bed and gas‐liquid bubbling bed. However, only few papers , considered the influence of particles on hydrodynamics in slurry beds. Ojima et al.…”

Section: Introductionmentioning

confidence: 99%

“…Other researches [16,17] have been done on the different interphase momentum exchanges between slurry bed and gasliquid bubbling bed. However, only few papers [14,[18][19][20] considered the influence of particles on hydrodynamics in slurry beds. Ojima et al [14] modified the coalescence efficiency by introducing a correction factor based on experimental data and compared with the models without modification at low superficial gas velocity (U g 0.034 m s -1 ).…”

Section: Introductionmentioning

confidence: 99%

Population Balance Model Simulation of the Particle Effect on Flow Hydrodynamics in Slurry Beds

Shi

et al. 2019

Chem Eng & Technol

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Computational fluid dynamics (CFD) simulation can provide in‐depth knowledge on hydrodynamics in slurry‐bed reactors. The accuracy of CFD simulation is highly depending on the description of the interactions between gas phase and slurry phase with the drag model. Conventional drag models were usually developed for gas‐liquid systems without considering the presence of particles in slurry‐bed reactors. A modified drag model is proposed by taking into account the effect of particles. Simulation results proved the accuracy of the model in predicting hydrodynamics in the slurry bed. A higher particle concentration can increase the gas velocity and decrease the gas holdup due to the lower drag force between gas phase and slurry phase. The bubble size is predicted to be larger at higher particle concentrations due to the increased liquid eddy length scale. Considering the particle effect is critical for accurately simulating slurry‐bed reactors.

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Bubbly flow with particle attachment and detachment – A multi-phase CFD study

Cited by 33 publications

References 54 publications

Dynamic Modelling of Molten Slag-Matte Interactions in an Industrial Flash Smelting Furnace Settler

Dynamic Modelling of Molten Slag-Matte Interactions in an Industrial Flash Smelting Furnace Settler

Experimental investigation on multiscale hydrodynamics in a novel gas–Liquid–Solid three phase jet‐Loop reactor

Population Balance Model Simulation of the Particle Effect on Flow Hydrodynamics in Slurry Beds

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