Experimental and Computational Investigation of Rotary Electromagnetic Stirring in a Woods Metal System.

Abstract

An experimental and computational investigation was carried out in an eiectromagneticaily stirred Woods metal system, and the associated free-surface deformation was studied. The free-surface velocities were measuredat various strengths of the applied magnetic fields using high-speed video photography. The effect of the magnetic field strength of the electromagnetic stirrer on the free surface deformation was studied by varying the position of the melt relative to the electromagnetic stirrer. Thecalculated free surface deformation was comparedto experimental observations made on a laboratory-scale installation.

Simulation of flow control in the meniscus of a continuous casting mold with opposing alternating current magnetic fields

“…[10] [11] Here, P k is the source term due to mean shear and G k is the source term due to thermal buoyancy; t (ϭ0.09 k 2 /) is the turbulent viscosity, h (ϭ0.9) is the turbulence Prandtl number used to calculate turbulent conductivity, and k (ϭ1.0) is the turbulence Prandtl number for k. The term (ϭ1.3) is the turbulence Prandtl number for , c 1 (ϭ1.44) is the coefficient of turbulence production, and c 2 (ϭ1.92) is the coefficient for decay-of-grid turbulence. The effective viscosity eff (ϭ l ϩ t ) is the sum of laminar and turbulent viscosities.…”

“…[1][2][3][4][5][6] Some stirrers have been evaluated by laboratory devices and computer modeling to improve the quality of castings by using various coil windings. [7][8][9][10][11] Stirred cylindrical pools to which a main frequency (i.e., 50 or 60 Hz) magnetic field is applied without the presence of a copper mold stand in contrast to industrial EMS systems installed on continuous billet-and-bloom casters, which are arranged around molds of predominantly square and rectangular crosssectional geometry. To increase the magnetic penetration to the center of the pool for stirring effect, the systems with cylindrical geometry never operate at the main frequency, but rather within a range below 10 Hz.…”

Visual System Experiment of MHD Pump Using Rotating Twisted Magnetic Field Applicable to High-temperature Molten Metals

“…Similar devices for material processing are an electromagnetic compocaster by Vives 6) and an electromagnetic stirrer by Partinen et al 7) Both machines are stirrers. Vives's machine drives the rotor, whose permanent magnets are disposed according to spiral staircase arrangement.…”

Experimental Investigations of Rotary Electromagnetic Mould Stirring in Continuous Casting Using a Cold Liquid Metal Model

“…[11][12][13][14][15][16][17] Numerical calculations can provide a better understanding of the complex flow behaviour, but experimental data are indispensable with respect to validation of these CFD models. Experimental investigations in an electromagnetically stirred Woods metal model were performed by Partinen et al 12,18) The authors measured the deformation of the free surface of the melt and determined the surface velocity using alumina particles on the surface. The motion of these particles was recorded by means of a high-speed video camera.…”