Numerical simulation of bubble formation in a molten steel bath
2015 (English)In: Proceedings of the 6th International Congress on the Science and Technology of Steelmaking, ICS 2015, Chinese Society for Metals , 2015, 366-369 p.Conference paper (Refereed)
Gas is often injected into molten steel by various devices, typically through tuyeres or porous plugs. This increases the thermal and chemical homogenization of the melts as well as helps to remove inclusions from the steel bath. The bubble formation from the gas injection devices is a key step in these operations. Therefore, it is necessary to make a clear prediction of the evolution of the bubble formation in a metallurgical reactor. In this paper, physical water model experiments were carried out to validate a three-dimensional numerical model, which was used to investigate the formation of bubbles in the liquid. Also, a high-speed camera was used to record the process of bubble formation. In the numerical model, the Volume-of-Fluid (VOF) method was used to track the interface between a gas and a liquid. The bubble size and formation frequency were studied both experimentally and numerically. The comparison in the air-water system shows a satisfactory agreement between experiment and simulation results. The mathematical model was then applied to simulate the argon-steel system. The bubble size and detachment time were investigated and compared to the results in the air-water system numerically. The comparison shows that the argon-steel system is characterized by the fact of a bigger bubble size and a lower bubble frequency under the same operating conditions.
Place, publisher, year, edition, pages
Chinese Society for Metals , 2015. 366-369 p.
Bubble formation, CFD, Molten steel, Water Model, Air, Computational fluid dynamics, High speed cameras, Intelligent control, Numerical methods, Numerical models, Psychrometers, Steel foundry practice, Steelmaking, Waterworks, Bubble frequency, Molten steel bath, Operating condition, Three-dimensional numerical modeling, Volume of fluid method, Water model experiments, Water modeling, Phase interfaces
IdentifiersURN: urn:nbn:se:kth:diva-194677ScopusID: 2-s2.0-84983165524OAI: oai:DiVA.org:kth-194677DiVA: diva2:1050459
6th International Congress on the Science and Technology of Steelmaking, ICS 2015, 12 May 2015 through 14 May 2015
QC 201611292016-11-292016-10-312016-11-29Bibliographically approved