Abstract
In this work, we study electrically induced flows numerically using open-source software and experimentally. Two systems are considered - single and multiphase (free surface) flows driven by axisymmetric DC and AC current injection. We investigate characteristic velocity and free surface deformation dependence on the injected current and validate it with experimental data. Results show that maximum axial velocity is a linear function of injected current, but free surface deformations are approximately proportional to current squared.
Highlights
Induced flows are found in many applications – arc furnaces, welding, etc. [1]
The second system is more complex – it consists of cylindrical container with 50Hz alternating current flowing between a small bottom electrode and conducting side wall
Firstly, numerical model of single-phase electrically induced flow in a cylindrical container was validated using experimental data – maximum axial velocity is in a good agreement to the measurements
Summary
Induced flows are found in many applications – arc furnaces, welding, etc. [1]. The goal of this work is to apply and validate open-source software for electromagnetically induced vortical flows, as well as to study two specific systems with industrial applications in mind. The second system (system B) is more complex – it consists of cylindrical container with 50Hz alternating current flowing between a small bottom electrode and conducting side wall In this case, the current flows through a layer of liquid metal causing free surface deformations near the small electrode at the center. The current flows through a layer of liquid metal causing free surface deformations near the small electrode at the center Possible application of this system can be slag removal from the melt in special applications – surface deformation is pushing the slag towards the side wall where it can be collected – this is demonstrated experimentally. Another application could be surface wave generation and flow intensification for improved melt purification via evaporation from the surface
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