Gas-Liquid Reaction Model in Gas-Stirred Systems: Part 1. Numerical Model

Venturini, Gabriela; Goldschmit, Marcela B.

doi:10.1007/s11663-007-9035-4

Cited by 16 publications

(9 citation statements)

References 37 publications

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“…In the steel melt surface mass transfer coefficient is given by correlation proposed by Kataoka et al

h_{i} = c {(\frac{ϵ}{ν})}^{\frac{1}{4}} D_{i}^{\frac{1}{2}} .

ϵ i is turbulence dissipation rate taken from CFD model, D i is diffusion coefficient for species i and v kinematic viscosity of steel. In original work, constant C was 0.5 for open channel flows, in bubbly flows constant C has been used with values 0.3 and 0.5 . In this work, 0.3 is used.…”

Section: Methodsmentioning

confidence: 99%

An Improved Model for the Heat‐Up Stage of the CAS‐OB Process: Development and Validation

Kärnä

Järvinen²,

Sulasalmi

et al. 2018

steel research int.

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A medium carbon alloy steel with a strength of 2.0GPa is obtained by a novel multi-step process. This is attributed to a synergistic multi-phase strengthening effect. The SEM micrograph of the tensile fracture surface exhibits a mixed mode of quasi-cleavage and dimple rupture, which confi rms the high strength obtained. Further details can be found in the article, number 1800207, by Cheng Liu and co-workers.

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“…In the steel melt surface mass transfer coefficient is given by correlation proposed by Kataoka et al

h_{i} = c {(\frac{ϵ}{ν})}^{\frac{1}{4}} D_{i}^{\frac{1}{2}} .

Section: Methodsmentioning

confidence: 99%

An Improved Model for the Heat‐Up Stage of the CAS‐OB Process: Development and Validation

Kärnä

Järvinen²,

Sulasalmi

et al. 2018

steel research int.

View full text Add to dashboard Cite

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“…VOF method belongs to the Eulerian-Eulerian model which is the most selected one to calculate multiphase flows [7]. In the VOF functions, F is defined to represent fractional volume and is decided by equation (6) in a 2-D case [9],…”

Section: B Vof Methods To Simulate Multiphase Flowmentioning

confidence: 99%

“…Through equation (6) together with basic dynamic flow functions and proper boundary conditions, F field as well as flow field can be solved, and according to equation (7), the free surfaces are determined.…”

Section: B Vof Methods To Simulate Multiphase Flowmentioning

confidence: 99%

“…Furthermore, Mazumdar and Guthrie did some amendment to coefficients of the k-ε model to attain higher accuracy [6]. Based on the dynamic fluid model, Venturini and Goldschmit proposed a mass transfer model to investigate gas-liquid reactions [7]. To understand flows in actual ladles better, Xia carried out CFD calculation and experiments on flows in Wood's metal, whose density and viscosity are more close to molten iron [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical and Experimental Study on the Multiphase Flow in Gas-Carried Powder Injection Desulphurization Processes

Lin¹,

Chen²,

Xie³

2015

Proceedings of the 2015 Asia-Pacific Energy Equipment Engineering Research Conference

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Injection of gas-carried powders by an immersed lance is among the most popular desulphurization methods in many metallurgical processes. This paper proposes a CFD algorithm to simulate the transient multiphase flow in the powder injection process, using the volume of fluid (VOF) method to calculate the gas-liquid flow and discrete phase model (DPM) to capture particles motions. The k-ε model is also adopted to solve the turbulent flow field. Experimental results on a water model are compared with CFD simulation results and qualitative agreement is found. Then, the CFD algorithm is used to numerically study the multiphase flow in the powder injection process, with an emphasis on the particles distribution. Influences on powders distribution of lance entering length and injection speed are also investigated.

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“…Argon-stirred ladles are commonly used in the secondary refining [1] to homogenize chemical compositions and the temperature [2][3][4][5] , to remove inclusions, [6,7] and to enhance the slag-metal reactions. [8][9][10] Many publications have been done to investigate the mixing phenomena in argonstirred ladles experimentally [11][12][13][14][15][16][17][18][19][20][21][22] and numerically, [23][24][25][26][27][28][29][30][31][32][33][34] but less of them coupled the melting of alloy particles.…”

Section: Introductionmentioning

confidence: 99%

Effect of Melt Superheat and Alloy Size on the Mixing Phenomena in Argon‐Stirred Steel Ladles

Duan¹,

Zhang²,

Thomas

2018

steel research int.

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In the current study, the melting and mixing behavior of the alloy in argon‐stirred steel ladles is simulated based on the turbulent fluid flow. The formation of the solidified steel shells around cold ferroalloy particles is considered and the discrete phase model is adopted to predict the motion of ferroalloy particles. Ferroalloy particles are heated by the surrounding liquid during their travel trajectories and the mixing of dissolved alloy solute is described by the species transport model as the steel shell disappears. User defined functions are used to record the melting time and the trajectory length of each ferroalloy particle, as well as to check the mixing criteria in every cell and predict the local mixing time in the entire computational domain. Mixing time maps which visualize the mixing efficiency are obtained as a novel representation to describe the local mixing time in the entire ladle. The effects of the superheat of the melt and the diameter of alloy particles are investigated. The results show that the higher superheat of the melt and the smaller size of alloy particle facilitate the melting and mixing of the alloy in argon‐stirred steel ladles.

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Gas-Liquid Reaction Model in Gas-Stirred Systems: Part 1. Numerical Model

Cited by 16 publications

References 37 publications

An Improved Model for the Heat‐Up Stage of the CAS‐OB Process: Development and Validation

An Improved Model for the Heat‐Up Stage of the CAS‐OB Process: Development and Validation

Numerical and Experimental Study on the Multiphase Flow in Gas-Carried Powder Injection Desulphurization Processes

Effect of Melt Superheat and Alloy Size on the Mixing Phenomena in Argon‐Stirred Steel Ladles

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