skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on June 27, 2019

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

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 bemore » used for liquid metal control within next-generation fusion reactors.« less
Authors:
ORCiD logo [1] ;  [1] ;  [1]
  1. Princeton Univ., NJ (United States). Dept. of Mechanical and Aerospace Engineering
Publication Date:
Grant/Contract Number:
AC02-09CH11466
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)
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1463295
Alternate Identifier(s):
OSTI ID: 1457490

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., Web. doi:10.1063/1.5026993.
Fisher, A. E., Kolemen, E., & Hvasta, M. G.. Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force. United States. doi:10.1063/1.5026993.
Fisher, A. E., Kolemen, E., and Hvasta, M. G.. 2018. "Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force". United States. doi:10.1063/1.5026993.
@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 = {2018},
month = {6}
}