About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Research in Reduced Gravity
|
| Presentation Title |
Effect of parametric excitation of a magnetically levitated droplet on the measurement of viscosity |
| Author(s) |
Valdis Bojarevics |
| On-Site Speaker (Planned) |
Valdis Bojarevics |
| Abstract Scope |
Measurement of laminar viscosity in liquid metals is known to be prone to a significant error even in microgravity conditions. This paper reports a new effect of parametric excitation of the levitated droplet in microgravity experiments at the International Space Station. The results are obtained using the high-accuracy spectral numerical technique. Long-term numerical simulation gives insight into the mechanics of the initial heating pulse excitation stage and the following damped oscillation in the positioning coil field. The oscillating surface shape variation leads to the parametric excitation of the flow in the droplet due to the induced electromagnetic force variation at the same natural frequency as the droplet oscillation. The results are compared to the available detailed experimental measurements at the ISS. To mitigate the problems related to AC magnetic levitation, new ideas using additional DC diamagnetic levitation are demonstrated both in terrestrial gravity and microgravity space experiment conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Other |