|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Experimental study of bubbly flows injected through top submerged lance (TSL) into a liquid metal
||Megumi Akashi, Daniele Obiso, Natalia Shevchenko, Markus A. Reuter, Sven Eckert
|On-Site Speaker (Planned)
We report laboratory experiments focusing on the formation and behavior of bubbly flows in a liquid metal layer arising from gas injection through a top submerged lance (TSL). Visualization of the bubble dynamics was achieved using X-ray radiography combined with high-speed imaging. The experiments were carried out in a parallelepiped container using GaInSn, a ternary alloy that is liquid at room temperature. The results show that a deep position of the submerged lance causes an asymmetric large-scale circulation inside the fluid vessel. Bubbling frequencies were calculated by fast Fourier Transformation from fluctuations of the image brightness in the vicinity of the nozzle injection point. An increasing gas flow rate results in an increasing size of the gas bubbles and mean bubble velocities. Furthermore, we performed experiments in a three-dimensional cylinder to investigate the influence of the vessel geometry on the bubble distribution and the dynamics of the bubble-driven flow.
||Pyrometallurgy, High-Temperature Materials, Process Technology