Cristin-resultat-ID: 181425
Sist endret: 21. oktober 2013, 12:14
Resultat
Vitenskapelig foredrag
2001

A Marker Chain Front Tracking Method for Modelling Meniscus Dynamics in the Al Ingot Casting Process

Bidragsytere:
  • Fionn Iversen og
  • Jon Arne Bakken

Presentasjon

Navn på arrangementet: Computational Modeling of Materials, Minerals and Metals Processing
Sted: Seattle
Dato fra: 22. februar 2002

Arrangør:

Arrangørnavn: [Mangler data]

Om resultatet

Vitenskapelig foredrag
Publiseringsår: 2001

Importkilder

Bibsys-ID: r02005604

Beskrivelse Beskrivelse

Tittel

A Marker Chain Front Tracking Method for Modelling Meniscus Dynamics in the Al Ingot Casting Process

Sammendrag

In conventional direct chill (DC) hot-top casting of aluminium extrusion ingot using 'gas-slip', poor surface quality of the cast ingot may appear. It is believed that these defects are related to instabilities such as periodic oscillations or folding of the meniscus (the interface between liquid metal and gas in the mould). The object of this work is to develop a stable and reliable model for simulation of the meniscus dynamics. A new 2D cylinder symmetric front tracking model has been developed for the meniscus propagation, and is implemented in a general Navier Stokes solver. The model is based on a finite volume cubic spline marker chain technique. The advantages of the model is its applicability to cases with large density ratios and its ability to calculate independent velocity fields for phases on separate sides of an interface, thereby making it possible to model the dynamics of thin films with a thickness scale smaller than the typical grid size. Effects of surface tension and wetting are also easily applied in the marker chain model. The model is applied to the DC casting process. Results are compared with data from plant test runs and suggestions are made on how to improve the casting process.

Bidragsytere

Fionn Iversen

  • Tilknyttet:
    Forfatter

Jon Arne Bakken

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet
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