Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Numerical Simulation on the Formation and Pinching Plasma in X-pinch Wires on 2-D Geometry

자기유체역학 코드를 이용한 축 대칭 엑스 핀치 플라즈마 구조의 2차원 전산해석

  • Byun, Sangmin (Department of Energy Systems Engineering, Seoul National University) ;
  • Na, Yong-Su (Department of Energy Systems Engineering, Seoul National University) ;
  • Chung, Kyoung-Jae (Department of Energy Systems Engineering, Seoul National University) ;
  • Kim, Deok-Kyu (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Lee, Sangjun (Department of Energy Systems Engineering, Seoul National University) ;
  • Lee, Chanyoung (Department of Energy Systems Engineering, Seoul National University) ;
  • Ham, Seunggi (Department of Energy Systems Engineering, Seoul National University) ;
  • Ryu, Jonghyeon (Department of Energy Systems Engineering, Seoul National University)
  • 변상민 (서울대학교 에너지시스템공학부) ;
  • 나용수 (서울대학교 에너지시스템공학부) ;
  • 정경재 (서울대학교 에너지시스템공학부) ;
  • 김덕규 (국방과학연구소 제4기술연구본부) ;
  • 이상준 (서울대학교 에너지시스템공학부) ;
  • 이찬영 (서울대학교 에너지시스템공학부) ;
  • 함승기 (서울대학교 에너지시스템공학부) ;
  • 류종현 (서울대학교 에너지시스템공학부)
  • Received : 2020.11.30
  • Accepted : 2021.03.12
  • Published : 2021.04.05
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Abstract

This paper deals with the computational work to characterize the formation and pinching of a plasma in an X-pinch configuration. A resistive magnetohydrodynamic model of a single fluid and two temperature is adopted assuming a hollow conical structure in the (r,z) domain. The model includes the thermodynamic parameter of tungsten from the corrected Thomas-Fermi EOS(equation of state), determining the average ionization charge, pressure, and internal energy. The transport coefficients, resistivity and thermal conductivity, are obtained by the corrected Lee & More model and a simple radiation loss rate by recombination process is considered in the simulation. The simulation demonstrated the formation of a core-corona plasma and intense compression process near the central region which agrees with the experimental observation in the X-pinch device at Seoul National University. In addition, it confirmed the increase in radiation loss rate with the density and temperature of the core plasma.

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References

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