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On the avoidance of ripple marks on cast metal surfaces
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Casting of Metals.ORCID iD: 0000-0002-8318-1251
2015 (English)In: International Journal of Heat and Mass Transfer, ISSN 0017-9310, Vol. 86, 43-54 p.Article in journal (Refereed) Published
Abstract [en]

A mathematical model is derived for the purposes of predicting how to avoid unwanted defects, known as ripple marks, in the casting of metal ingots; the model is based around the momentum and heat transfer that occurs when a cooling molten metal meniscus rises between two parallel and vertical chill-mould walls. By using asymptotic techniques, the model is reduced systematically to a form that requires the numerical solution of a moving boundary problem involving just one partial differential equation. Numerical results are presented, and the significance of the model for predicting the depth and spacing of ripple marks in the casting of ingots and oscillation marks in continuous casting are discussed.

Place, publisher, year, edition, pages
2015. Vol. 86, 43-54 p.
Keyword [en]
Asymptotics, Casting, Ripple marks
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-167023DOI: 10.1016/j.ijheatmasstransfer.2015.02.063ISI: 000355029900006ScopusID: 2-s2.0-84924902037OAI: diva2:813304

QC 20150522

Available from: 2015-05-22 Created: 2015-05-21 Last updated: 2015-06-16Bibliographically approved

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Vynnycky, Michael
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