Gas–liquid flow generated by a Rushton turbine in stirred vessel: CARPT/CT measurements and CFD simulations

Khopkar, Avinash R.; Rammohan, Aravind; Ranade, Vivek V.; Duduković, Milorad P.

doi:10.1016/j.ces.2004.11.044

Cited by 170 publications

(92 citation statements)

References 30 publications

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“…Other interphase forces are neglected in the present study in accordance with Khopkar et al [7]. The drag force between the gas and liquid phases is represented by the following equation…”

Section: Eulerian Multiphase Hydrodynamic Equationssupporting

confidence: 52%

Numerical simulations of gas-liquid flow in the gas injection process with mechanical stirring

Shao¹,

Zhang²,

Liu³

et al. 2013

AIP Conference Proceedings

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Abstract. Based on Euler-Euler approach, a mathematical model is established to describe gas and liquid two-phase flow in a gas injected mechanically stirred system used in hot metal desulfurization process. The influences of different impellers types and rotation methods were investigated. The results show that the predicted distribution of bubbles in the bath agrees well with experimental results. The gas-liquid flow in the gas injected-mechanically stirred system can be accurately described by the present model. Compared to the standard impeller, the improved impeller in forward stirring mode is more efficient to increase the retention time and dispersion of bubbles.

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“…Other interphase forces are neglected in the present study in accordance with Khopkar et al [7]. The drag force between the gas and liquid phases is represented by the following equation…”

Section: Eulerian Multiphase Hydrodynamic Equationssupporting

confidence: 52%

Numerical simulations of gas-liquid flow in the gas injection process with mechanical stirring

Shao¹,

Zhang²,

Liu³

et al. 2013

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…However, only the contribution of drag force has been considered in this study because the other forces have no considerable effect on solid-liquid hydrodynamics in stirred tanks [17] [18]. The drag force exerted by the dispersed phase on the continuous phase is calculated as:…”

Section: Interphase Momentum Transfermentioning

confidence: 99%

Determination of Flow Structure in a Gold Leaching Tank by CFD Simulation

Dagadu¹,

Stęgowski²,

Furman³

et al. 2014

JAMP

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Experimental residence time distribution (RTD) measurement and computational fluid dynamics (CFD) simulation are the best methods to study the hydrodynamics of process flow systems. However, CFD approach leads to better understanding of the flow structure and extent of mixing in stirred tanks. In the present study, CFD models were used to simulate the flow in an industrial gold leaching tank. The objective of the investigation was to characterize the flowfield generated within the tank after process intensification. The flow was simulated using an Eulerian-Eulerian multi-fluid model where the RANS standard -ε mixture model and a multiple reference frame approach were used to model turbulence and impeller rotation respectively. The simulated flowfield was found to be in agreement with the flow pattern of pitched blade axial-flow impellers that was used for mixing. The leaching tank exhibited good "off-bottom suspension" which reveals minimum deposition of gold ore particles on the bottom of the leaching tanks. Simulation results were consistent with experimental results obtained from a radioactive tracer investigation. CFD approach gave a better description of the flow structure and extent of mixing in a leaching tank. Hence it could be a preferred approach for flow system analysis where the cost of experimentation is high.

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“…WUStL personnel have experience with CARPT in bubble columns (Degaleesan et al, 1996), digesters (Karim et al, 2004), stirred tanks (Rammohan et al, 2000;Khopkar et al, 2005), and CFBs (Bhusarapu et al, 2004ab, 2005(Bhusarapu et al, 2004ab, , 2006Bhusarapu, 2005). Larachi et al (1994) and Cassanello et al (1999) discuss application of CARPT to a spouted bed.…”

Section: Computer Aided Radioactive Particle Tracking (Carpt)mentioning

confidence: 99%

Circulating fluidized bed hydrodynamics experiments for the multiphase fluid dynamics research consortium (MFDRC).

Oelfke¹,

Torczynski²,

O’Hern³

et al. 2006

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An experimental program was conducted to study the multiphase gas-solid flow in a pilot-scale circulating fluidized bed (CFB). This report describes the CFB experimental facility assembled for this program, the diagnostics developed and/or applied to make measurements in the riser section of the CFB, and the data acquired for several different flow conditions. Primary data acquired included pressures around the flow loop and solids loadings at selected locations in the riser. Tomographic techniques using gamma radiation and electrical capacitance were used to determine radial profiles of solids volume fraction in the riser, and axial profiles of the integrated solids volume fraction were produced. Computer Aided Radioactive Particle Tracking was used to measure solids velocities, fluxes, and residence time distributions. In addition, a series of computational fluid dynamics simulations was performed using the commercial code Arenaflow™.

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Gas–liquid flow generated by a Rushton turbine in stirred vessel: CARPT/CT measurements and CFD simulations

Cited by 170 publications

References 30 publications

Numerical simulations of gas-liquid flow in the gas injection process with mechanical stirring

Numerical simulations of gas-liquid flow in the gas injection process with mechanical stirring

Determination of Flow Structure in a Gold Leaching Tank by CFD Simulation

Circulating fluidized bed hydrodynamics experiments for the multiphase fluid dynamics research consortium (MFDRC).

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