Please use this identifier to cite or link to this item: http://arks.princeton.edu/ark:/88435/dsp01b2773z44j
 Title: Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force Contributors: Fisher, AdamKolemen, EgemenHvasta, MikeU. S. Department of Energy contract number DE-AC02-09CH11466 Keywords: liquid metalhydraulic jumpLorentz forceMHD Issue Date: 2018 Publisher: Princeton Plasma Physics Laboratory, Princeton University Related Publication: Physics of Fluids vol. 30, page 067104 (2018) Abstract: In this paper, hydraulic jump control using electromagnetic force in a liquid metal flow is presented. The control methods used give insight into the hydraulic jump behavior in the presence of magnetic fields and electrical currents. Flowing liquid metals is a proposed solution to heat flux challenges posed in fusion reactors, specifically the tokamak. Unfortunately, thin, fast-flowing liquid metal divertor concepts for fusion reactors are susceptible to hydraulic jumps that drastically reduce the liquid metal flow speed, leading to potential problems such as excessive evaporation, unsteady power removal, and possible plasma disruption. Highly electrically conductive flows within the magnetic fields do not exhibit traditional hydraulic jump behavior. There is very little research investigating the use of externally injected electrical currents and magnetic fields to control liquid metal hydraulic jumps. By using externally injected electrical currents and a magnetic field, a Lorentz force (also referred to as j × B force) may be generated to control the liquid metal jump behavior. In this work, a free-surface liquid metal—GaInSn eutectic or “galinstan”—flow through an electrically insulating rectangular duct was investigated. It was shown that applying a Lorentz force has a repeatable and predictable impact on the hydraulic jump, which can be used for liquid metal control within next-generation fusion reactors. URI: http://arks.princeton.edu/ark:/88435/dsp01b2773z44j Referenced By: https://doi.org/10.1063/1.5026993 Appears in Collections: Plasma Science & Technology

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