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|Title:||Demonstrating electromagnetic control of free-surface, liquid-metal flows relevant to fusion reactors|
|Contributors:||Hvasta, M. G.|
Fisher, A. E.
U. S. Department of Energy contract number DE-AC02-09CH11466
|Publisher:||Princeton Plasma Physics Laboratory, Princeton University|
|Related Publication:||Nuclear Fusion, 58 (2018) 016022|
|Abstract:||Plasma-facing components (PFC's) made from solid materials may not be able to withstand the large heat and particle fluxes that will be produced within next-generation fusion reactors. To address the shortcomings of solid PFC's, a variety of liquid-metal (LM) PFC concepts have been proposed. Many of the suggested LM-PFC designs rely on electromagnetic restraint (Lorentz force) to keep free-surface, liquid-metal flows adhered to the interior surfaces of a fusion reactor. However, there is very little, if any, experimental data demonstrating that free-surface, LM-PFC's can actually be electromagnetically controlled. Therefore, in this study, electrical currents were injected into a free-surface liquid-metal that was flowing through a uniform magnetic field. The resultant Lorentz force generated within the liquid-metal affected the velocity and depth of the flow in a controllable manner that closely matched theoretical predictions. These results show the promise of electromagnetic control for LM-PFC's and suggest that electromagnetic control could be further developed to adjust liquid-metal nozzle output, prevent splashing within a tokamak, and alter heat transfer properties for a wide-range of liquid-metal systems.|
|Appears in Collections:||Plasma Science & Technology|
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