Numerical modelling of metallurgical processes using les

verfasst von: Egbert Baake, Andrejs Umbrashko, Andris Jakovics
Abstract: Comprehensive knowledge of the heat and mass transfer processes in the melt of induction furnaces is required to realize efficient and reliable melting and casting processes. Experimental and numerical studies of the melt flow in induction furnaces show that the flow pattern, which comprise several vortexes of the mean flow, and the temperature distribution in the melt are significantly influenced by low-frequency large scale flow oscillations. The experimental and numerical investigations of the turbulent melt flow are carried out in various laboratory and industrial sized induction furnaces, like induction crucible furnace and induction furnace with cold crucible. Two-and three-dimensional hydrodynamic calculations of the melt flow, using two-equation turbulence models based on Reynolds Averaged Navier-Stokes approach, do not predict the large scale periodic flow instabilities obtained from the experimental data. That's why the Large Eddy Simulation (LES) numerical technique, which is considered to be some kind of compromise between the k-ε model with relative low mesh quality requirements and Direct Numerical Simulation (DNS) method based on non-averaged Navier-Stokes equations, was approved to be an alternative for the various k-ε model modifications. The results of the transient 3D LES simulation of the turbulent melt flow revealed the large scale periodic flow instabilities and the temperature distribution in the melt, which both are in good agreement with the expectations based on the data from the experiments. In order to investigate convective scalar transport mechanism in the considered flow the discrete particle tracing approach has been carried out. The studies, presented in this paper, content the numerical simulation of turbulent melt flow of experimental and industrial size induction furnaces and demonstrate the possibility of using the three-dimensional transient LES approach for successful simulation of heat and mass transfer processes in metallurgical applications.
Organisationseinheit(en): Institut für Elektroprozesstechnik
Externe Organisation(en): University of Latvia
Typ: Artikel
Journal: Archives of Electrical Engineering
Band: 54
Seiten: 425-437
Anzahl der Seiten: 13
ISSN: 0004-0746
Publikationsdatum: 2005
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Elektrotechnik und Elektronik

BibTeX

@article{d0486724983d4c9d8052f25781053db5,
title = "Numerical modelling of metallurgical processes using les",
abstract = "Comprehensive knowledge of the heat and mass transfer processes in the melt of induction furnaces is required to realize efficient and reliable melting and casting processes. Experimental and numerical studies of the melt flow in induction furnaces show that the flow pattern, which comprise several vortexes of the mean flow, and the temperature distribution in the melt are significantly influenced by low-frequency large scale flow oscillations. The experimental and numerical investigations of the turbulent melt flow are carried out in various laboratory and industrial sized induction furnaces, like induction crucible furnace and induction furnace with cold crucible. Two-and three-dimensional hydrodynamic calculations of the melt flow, using two-equation turbulence models based on Reynolds Averaged Navier-Stokes approach, do not predict the large scale periodic flow instabilities obtained from the experimental data. That's why the Large Eddy Simulation (LES) numerical technique, which is considered to be some kind of compromise between the k-ε model with relative low mesh quality requirements and Direct Numerical Simulation (DNS) method based on non-averaged Navier-Stokes equations, was approved to be an alternative for the various k-ε model modifications. The results of the transient 3D LES simulation of the turbulent melt flow revealed the large scale periodic flow instabilities and the temperature distribution in the melt, which both are in good agreement with the expectations based on the data from the experiments. In order to investigate convective scalar transport mechanism in the considered flow the discrete particle tracing approach has been carried out. The studies, presented in this paper, content the numerical simulation of turbulent melt flow of experimental and industrial size induction furnaces and demonstrate the possibility of using the three-dimensional transient LES approach for successful simulation of heat and mass transfer processes in metallurgical applications.",
keywords = "Induction melting, Large eddy simulation, Metallurgical processes, Numerical modelling",
author = "Egbert Baake and Andrejs Umbrashko and Andris Jakovics",
note = "Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",
year = "2005",
language = "English",
volume = "54",
pages = "425--437",
journal = "Archives of Electrical Engineering",
issn = "0004-0746",
publisher = "Instytut Elektrotechniki PAN",
number = "214",
}