Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force

Fisher, A. E.; Kolemen, E.; Hvasta, M. G.

doi:10.1063/1.5026993

Title: Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force

Abstract

Here 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.

Authors:

^[1]; Kolemen, E. ^[1]; Hvasta, M. G. ^[1]

Princeton Univ., NJ (United States). Dept. of Mechanical and Aerospace Engineering

Publication Date:: Wed Jun 27 00:00:00 EDT 2018

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Laboratory Directed Research and Development (LDRD) Program

OSTI Identifier:: 1463295

Alternate Identifier(s):: OSTI ID: 1457490

Grant/Contract Number:: AC02-09CH11466

Resource Type:: Accepted Manuscript

Journal Name:: Physics of Fluids

Additional Journal Information:: Journal Volume: 30; Journal Issue: 6; Journal ID: ISSN 1070-6631

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Fisher, A. E., Kolemen, E., and Hvasta, M. G. Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5026993.

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                    Fisher, A. E., Kolemen, E., & Hvasta, M. G. Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force.  United States.  https://doi.org/10.1063/1.5026993

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                    Fisher, A. E., Kolemen, E., and Hvasta, M. G. Wed .  
"Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force".  United States.  https://doi.org/10.1063/1.5026993.  https://www.osti.gov/servlets/purl/1463295.

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@article{osti_1463295,

  title        = {Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force},

  author       = {Fisher, A. E. and Kolemen, E. and Hvasta, M. G.},

  abstractNote = {Here 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.},

  doi          = {10.1063/1.5026993},

  journal      = {Physics of Fluids},

  number       = 6,

  volume       = 30,

  place        = {United States},

  year         = {Wed Jun 27 00:00:00 EDT 2018},

  month        = {Wed Jun 27 00:00:00 EDT 2018}

}

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