Numerical Simulation of Inclusion Removal by Bubble Injection in the Submerged Nozzle With Swirling Flow

The removal of inclusions is of great importance in metallurgical industry. In this paper, a novel swirling flow generator (SFG) is intended to be installed around the inlet of the submerge entry nozzle (SEN) in the tundish to generate a swirling flow in the SEN by utilizing gravitational potential...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2022-08, Vol.53 (4), p.2570-2586
Main Authors: Xin, Zhao-yang, Cui, He-nan, Li, Tao, Tang, Guo-zhang, Zhu, Yu-lin, Yan, Jian-chuan, Li, Jun-guo
Format: Article
Language:English
Subjects:
Bubbles
Characterization and Evaluation of Materials
Chemistry and Materials Science
Collision rates
Continuous casting
Electromagnetism
Fluid dynamics
Fluid flow
Inclusions
Materials Science
Mathematical models
Metallic Materials
Metallurgy
Nanotechnology
Nozzles
Original Research Article
Potential energy
Research methodology
Simulation
Steel products
Structural Materials
Surfaces and Interfaces
Swirling
Thin Films
Tundishes
Turbulence models
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Summary:The removal of inclusions is of great importance in metallurgical industry. In this paper, a novel swirling flow generator (SFG) is intended to be installed around the inlet of the submerge entry nozzle (SEN) in the tundish to generate a swirling flow in the SEN by utilizing gravitational potential energy. Herein, the motion and interaction between bubbles and inclusion particles in the swirling flow field are simulated by Discrete Phase Model (DPM) in the three-phase fluid flow. In the swirling flow, collision between the inclusions particles and bubbles is governed by a self-developed User-Defined Function (UDF) program. The radial pressure gradient force causes inclusion particles to move toward the center. In the central area in the SEN, the collision rate between inclusion particles and bubbles increases significantly. Thus, bubble injection in swirling flow is beneficial to the removal of inclusion particles. The removal efficiency of inclusion particles of various sizes in tundish with SFG is investigated in this paper, which is valuable for the design of the industrial tundish.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-022-02552-z