About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Research in Reduced Gravity
|
Presentation Title |
Modelling Liquid Droplet Oscillation and Laminar Damping in Reduced Gravity Conditions |
Author(s) |
Valdis Bojarevics |
On-Site Speaker (Planned) |
Valdis Bojarevics |
Abstract Scope |
Electromagnetic levitation of liquid droplets for a noncontact liquid material properties measurements are investigated in detail using the high accuracy spectral method numerical modelling techniques and comparing to the experimental observations at the ISS. The long term nonlinear simulation results give a deeper insight to the mechanics and dynamic regimes of the interacting surface oscillation and the internal circulation generated by the AC electromagnetic forces. The example of the nickel based alloy LEK94 provides experimental results which are replicated closely by the numerical predictions. The results indicate that the flow stays completely laminar with internal recirculation velocities reaching 0.40 m/s, the oscillation frequencies experience predictable small shifts from the Rayleigh analytical predictions, the damping rate leads to an accurate laminar viscosity comparable to the measured value. New ideas for the EML technique using high strength permanent magnets are discussed, which could be implemented in the future space experiments. |
Proceedings Inclusion? |
Planned: Publication Outside of TMS |