Electromagnetic Stirring Technique in Metallurgy and Material Processing
A special issue of Metals (ISSN 2075-4701).
Deadline for manuscript submissions: closed (30 August 2019) | Viewed by 11968
Special Issue Editor
Interests: magnetohydrodynamic controlling molten metal flow, electromagnetic metal stirring, Lorentz force metal flow measurement
Special Issue Information
Dear Colleagues,
1. We study the interaction of electromagnetic fields with molten metals and use the fact that, depending on the shape, the applied magnetic field contributes to either suppressing turbulence and laminarization, or intensifying turbulent fluctuations in fluid (which is important at crystallization). These phenomena can be used for aimed tasks of the processing of materials. Along with this, electromagnetic techniques of molten metal transportation and flow control are used.
2. We develop a method and devices for the non-contacting electromagnetic stirring of electrically conductive substances (e.g., liquid metals, electrolytes) using oscillating inhomogeneous magnetic fields. The magnetic field is generated by a magnet system that is close to a container filled with an electrically conductive substance. Oscillation of the magnetic field produces a controllable Lorentz force that creates a velocity field in the electrically conductive substance, promoting mixing of locally heated fluid or added substances (e.g., particulate additives). It improves homogenization of additives during the production of metallic alloys, e.g., in the steel continuous casting process, in aluminium production, etc.
3. Molten metal flow at high temperature can be effectively measured by using external constant magnetic fields. The applied technique is termed Lorentz force flowmeter (LFF) and is based on exposing the flow to a magnet system and measuring the drag force acting upon it. We derive the scaling law that relates the force acting on a localized magnet system to the flow rate of the electrically conducting fluid. This law shows that LFF, if properly designed, has a wide range of potential applications in ferrous and non-ferrous metallurgy.
Prof. Dr. Yuri B. Kolesnikov
Guest Editor
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Keywords
- Molten metal
- Electromagnetic interaction
- Turbulence
- Laminarization
- Metal stirring
- Lorentz force velocimetry
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