Melt flow patterns in metallurgical MHD devices with combined inductive and conductive power supply

verfasst von: S. Pavlovs, A. Jakovičs, E. Baake, B. Nacke
Abstract: The paper presents a numerical study of metallurgical magnetohydrodynamic (MHD) devices with combined power supply: i) inductive by an alternating current (AC) coil; ii) conductive through electrodes with AC or direct current (DC). Peculiarities of the Lorentz force computations are discussed for the following cases: i) the interaction of inductive or conductive currents with their self magnetic fields; ii) the cross effect of the interaction between the current and the magnetic field produced by different sources; iii) the phase shift between inductive and conductive currents. The developed 3D models for computations of electromagnetic (EM) and hydrodynamic (HD) fields are presented for the ladle furnace (LF) with an EM stirrer. A three-phase conductive current is supplied to electrodes submerged into the melt. An inductive current is supplied by a side non-symmetrical inductor, which is the source of a travelling magnetic field. Melt flow patterns are obtained also for an axisymmetric MHD device. The conductive single phase AC supplied to the top electrode submerged into the melt and to the bottom electrode is the source of electro-vortex convection (EVC). The inductive single phase AC supplied by an almost cylindrical coil (each winding has a thin gap) placed around the melt is the source of EM convection (EMC). Melt circulation is the results of the competition between EVC and EMC. MHD rotation appears due to the cross effect of the current-magnetic field interaction produced by different sources. The melt flow is computed by a 3D transient Shear Stress Transport ( SST) model of turbulence. Several estimations have been performed with a quasi-laminar model; the chosen effective turbulent viscosity is constant.
Organisationseinheit(en): Institut für Elektroprozesstechnik
Externe Organisation(en): University of Latvia
Typ: Artikel
Journal: Magnetohydrodynamics
Band: 50
Seiten: 303-315
Anzahl der Seiten: 13
ISSN: 0024-998X
Publikationsdatum: 2014
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemeine Physik und Astronomie, Elektrotechnik und Elektronik
Elektronische Version(en): https://doi.org/10.22364/mhd.50.3.8 (Zugang: Geschlossen)

BibTeX

@article{15a0406d209049da9a80aedebc32a91a,
title = "Melt flow patterns in metallurgical MHD devices with combined inductive and conductive power supply",
abstract = "The paper presents a numerical study of metallurgical magnetohydrodynamic (MHD) devices with combined power supply: i) inductive by an alternating current (AC) coil; ii) conductive through electrodes with AC or direct current (DC). Peculiarities of the Lorentz force computations are discussed for the following cases: i) the interaction of inductive or conductive currents with their self magnetic fields; ii) the cross effect of the interaction between the current and the magnetic field produced by different sources; iii) the phase shift between inductive and conductive currents. The developed 3D models for computations of electromagnetic (EM) and hydrodynamic (HD) fields are presented for the ladle furnace (LF) with an EM stirrer. A three-phase conductive current is supplied to electrodes submerged into the melt. An inductive current is supplied by a side non-symmetrical inductor, which is the source of a travelling magnetic field. Melt flow patterns are obtained also for an axisymmetric MHD device. The conductive single phase AC supplied to the top electrode submerged into the melt and to the bottom electrode is the source of electro-vortex convection (EVC). The inductive single phase AC supplied by an almost cylindrical coil (each winding has a thin gap) placed around the melt is the source of EM convection (EMC). Melt circulation is the results of the competition between EVC and EMC. MHD rotation appears due to the cross effect of the current-magnetic field interaction produced by different sources. The melt flow is computed by a 3D transient Shear Stress Transport ( SST) model of turbulence. Several estimations have been performed with a quasi-laminar model; the chosen effective turbulent viscosity is constant.",
author = "S. Pavlovs and A. Jakovi{\v c}s and E. Baake and B. Nacke",
year = "2014",
doi = "10.22364/mhd.50.3.8",
language = "English",
volume = "50",
pages = "303--315",
journal = "Magnetohydrodynamics",
issn = "0024-998X",
publisher = "Institute of Physics, University of Latvia",
number = "3",
}