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Numerical study on the influence of a swirling flow tundish on multiphase flow and heat transfer in mold
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0002-1203-0181
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0003-4384-7984
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2018 (English)In: Metals, ISSN 2075-4701, Vol. 8, no 5, article id 368Article in journal (Refereed) Published
Abstract [en]

The effect of a new cylindrical swirling flow tundish design on the multiphase flow and heat transfer in a mold was studied. The RSM (Reynolds stress model) and the VOF (volume of fluid) model were used to solve the steel and slag flow phenomena. The effect of the swirling flow tundish design on the temperature distribution and inclusion motion was also studied. The results show that the new tundish design significantly changed the flow behavior in the mold, compared to a conventional tundish casting. Specifically, the deep impingement jet from the SEN (Submerged Entry Nozzle) outlet disappeared in the mold, and steel with a high temperature moved towards the solidified shell due to the swirling flow effect. Steel flow velocity in the top of the mold was increased. A large velocity in the vicinity of the solidified shell was obtained. Furthermore, the risk of the slag entrainment in the mold was also estimated. With the swirling flow tundish casting, the temperature distribution became more uniform, and the dissipation of the steel superheat was accelerated. In addition, inclusion trajectories in the mold also changed, which tend to stay at the top of the mold for a time. A future study is still required to further optimize the steel flow in mold.

Place, publisher, year, edition, pages
MDPI AG , 2018. Vol. 8, no 5, article id 368
Keywords [en]
Continuous casting, Heat transfer, Mold, Multiphase flow, Swirling flow tundish
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-238229DOI: 10.3390/met8050368ISI: 000435109300078Scopus ID: 2-s2.0-85047458135OAI: oai:DiVA.org:kth-238229DiVA, id: diva2:1263057
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QC 20181114

Available from: 2018-11-14 Created: 2018-11-14 Last updated: 2018-11-14Bibliographically approved

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Ni, PeiyuanErsson, MikaelJonsson, Lage Tord IngemarJönsson, Pär

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