Large Eddy Simulation on the Two‐Phase Flow in a Water Model of Continuous Casting Strand with Gas Injection

The Large Eddy Simulation (LES) turbulent model coupled with VOF multiphase model and Lagrangian Discrete Phase Model (DPM) is applied to investigate the gas–liquid two‐phase flow and bubble distribution. The drag force, lift force, virtual mass force, and pressure gradient force are incorporated in the current developed model, and the lift force is added via user defined subroutine. The influence of the drag force, the lift force, bubble size, and gas flow rate on the distribution of bubbles and flow field are investigated. The PIV measurements are employed to validate the mathematical model. The results show that the gas injection can affect the flow field and bubble behavior directly. The impingement point on the narrow face and vortex core of the upper recirculation zone moves upward with the increase of gas flow rate. The drag force has distinct influences on the bubble distribution and flow field. The interaction induced by the lift force cannot be ignored. Without the consideration of the lift force, a larger flow velocity will be predicted. Moreover, the lift force has significant effect on the bubble distribution at mold thickness direction, especially the larger bubbles.

[1]  S. Cheung,et al.  Population balance modeling of polydispersed bubbly flow in continuous casting using average bubble number density approach , 2017 .

[2]  Baokuan Li,et al.  Large-Eddy Simulation of Transient Horizontal Gas–Liquid Flow in Continuous Casting Using Dynamic Subgrid-Scale Model , 2017, Metallurgical and Materials Transactions B.

[3]  S. Vanka,et al.  Large Eddy Simulations of the Effects of EMBr and SEN Submergence Depth on Turbulent Flow in the Mold Region of a Steel Caster , 2017, Metallurgical and Materials Transactions B.

[4]  S. Kuang,et al.  LBM-LES Simulation of the Transient Asymmetric Flow and Free Surface Fluctuations under Steady Operating Conditions of Slab Continuous Casting Process , 2017, Metallurgical and Materials Transactions B.

[5]  B. Thomas,et al.  Transient Two-Phase Flow in Slide-Gate Nozzle and Mold of Continuous Steel Slab Casting with and without Double-Ruler Electro-Magnetic Braking , 2016, Metallurgical and Materials Transactions B.

[6]  Sherman C.P. Cheung,et al.  Modeling of bubble behaviors and size distribution in a slab continuous casting mold , 2016 .

[7]  D. Tao.  Correct Expressions of Enthalpy of Mixing and Excess Entropy from MIVM and Their Simplified Forms , 2016, Metallurgical and Materials Transactions B.

[8]  S. Pirker,et al.  Secondary Vortex Formation in Bifurcated Submerged Entry Nozzles: Numerical Simulation of Gas Bubble Entrapment , 2015, Metallurgical and Materials Transactions B.

[9]  B. Thomas,et al.  Transient Fluid Flow during Steady Continuous Casting of Steel Slabs: Part I. Measurements and Modeling of Two-phase Flow , 2014 .

[10]  Z. Zou,et al.  Mathematical Modeling of Multi-sized Argon Gas Bubbles Motion and Its Impact on Melt Flow in Continuous Casting Mold of Steel , 2014 .

[11]  Baokuan Li,et al.  Transient Asymmetric Flow and Bubble Transport Inside a Slab Continuous-Casting Mold , 2014, Metallurgical and Materials Transactions B.

[12]  J. Björkvall,et al.  Recent Developments of a Numerical Model for Continuous Casting of Steel: Model Theory, Setup and Comparison to Physical Modelling with Liquid Metal , 2014 .

[13]  Brian G. Thomas,et al.  Large Eddy Simulations of Double-Ruler Electromagnetic Field Effect on Transient Flow During Continuous Casting , 2014, Metallurgical and Materials Transactions B.

[14]  Miaoyong Zhu,et al.  Numerical Simulation of Gas and Liquid Two-Phase Flow in Gas-Stirred Systems Based on Euler–Euler Approach , 2013, Metallurgical and Materials Transactions B.

[15]  Zhong-qiu Liu,et al.  Modeling of Transient Two-Phase Flow in a Continuous Casting Mold Using Euler-Euler Large Eddy Simulation Scheme , 2013 .

[16]  Yu Fang,et al.  LARGE EDDY SIMULATION FOR UNSTEADY TURBULENT FLOW IN THIN SLAB CONTINUOUS CASTING MOLD , 2012 .

[17]  Xiangjun Zuo,et al.  Flow Transport and Inclusion Motion in Steel Continuous-Casting Mold under Submerged Entry Nozzle Clogging Condition , 2008 .

[18]  B. Thomas,et al.  Investigation of Fluid Flow and Steel Cleanliness in the Continuous Casting Strand , 2007 .

[19]  B. Thomas,et al.  Numerical simulation on inclusion transport in continuous casting mold , 2006 .

[20]  A. K. Das,et al.  Experimental Simulation and Mathematical Modeling of Air Bubble Movement in Slab Caster Mold , 2006 .

[21]  Menghuai Wu,et al.  Influence of argon gas bubbles and non-metallic inclusions on the flow behavior in steel continuous casting , 2005 .

[22]  Fumitaka Tsukihashi,et al.  Vortexing flow patterns in a water model of slab continuous casting mold , 2005 .

[23]  Brian G. Thomas,et al.  Inclusion removal by bubble flotation in a continuous casting mold , 2004 .

[24]  Brian G. Thomas,et al.  Study of transient flow and particle transport in continuous steel caster molds: Part I. Fluid flow , 2004 .

[25]  M. Tamura,et al.  Interaction between Argon Gas Bubbles and Solidified Shell , 2004 .

[26]  Yong Li,et al.  Numerical simulation of gas–liquid–solid fluidization systems using a combined CFD-VOF-DPM method: bubble wake behavior , 1999 .

[27]  Tadashi Sakaguchi,et al.  Drag Coefficients of Single Bubbles under Normal and Micro Gravity Conditions , 1998 .

[28]  Brian G. Thomas,et al.  Simulation of Argon Gas Flow Effects in a Continuous Slab Caster , 1994 .

[29]  Brian G. Thomas,et al.  Simulation of fluid flow inside a continuous slab-casting machine , 1990 .

[30]  J. T. Kuo,et al.  Flow of bubbles through nozzles , 1988 .

[31]  N. Zuber,et al.  Drag coefficient and relative velocity in bubbly, droplet or particulate flows , 1979 .

[32]  J. Szekely,et al.  The physical and mathematical modeling of the flow field in the mold region in continuous casting systems: Part I. model studies with aqueous systems , 1972 .

[33]  F. J. Moody,et al.  Multiphase Flow Dynamics , 2022, Lecture Notes in Mechanical Engineering.

[34]  Cyrus K. Aidun,et al.  Lattice-Boltzmann Method for Complex Flows , 2010 .

[35]  Brian G. Thomas,et al.  Study of transient flow and particle transport in continuous steel caster molds: Part II. Particle transport , 2004 .

[36]  Hua Bai,et al.  Turbulent flow of liquid steel and argon bubbles in slide-gate tundish nozzles: Part II. Effect of operation conditions and nozzle design , 2001 .

[37]  M. Roustan,et al.  Numerical computation of turbulent gas-liquid dispersion in mechanically agitated vessels , 1996 .