About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Research in Reduced Gravity
|
Presentation Title |
Contactless Material Properties Measurement using AC or DC Magnetic Fields |
Author(s) |
Valdis Bojarevics |
On-Site Speaker (Planned) |
Valdis Bojarevics |
Abstract Scope |
Electromagnetic levitation of liquid droplets for noncontact liquid material properties measurements is investigated using the high accuracy spectral numerical technique and compared to the available detailed experimental measurements at the International Space Station. The long-term numerical simulation of the full measurement cycle gives a deeper insight into the mechanics and dynamic regimes of the interacting surface oscillation and the internal flow circulation generated by the electromagnetic force. The example of the nickel-based alloy LEK94 provides experimental results replicated by the numerical predictions. At the same time, the internal recirculation velocities reach 0.40 m/s, the oscillation frequencies experience predictable temperature-dependent shifts from the theoretical Rayleigh analytical estimates, and the damping rate matches the laminar viscosity measured experimentally. In addition to the AC magnetic levitation, new ideas using a purely DC magnetic levitation are demonstrated both in the terrestrial gravity and microgravity space experiment conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electrometallurgy, Modeling and Simulation, Characterization |