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Kinetic study of strong shock waves in fully ionized plasmas

Journal Article · · Physical Review. E
DOI:https://doi.org/10.1103/pr7n-48wl· OSTI ID:3009203
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  2. Osaka Univ., Suita (Japan)
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Fully kinetic simulations are used in this work to study strong shock waves in fully ionized plasmas for charge state 𝑍 ranging from 1 to 18. The ion stress tensor amplitude agrees well with classical predictions within the compression layer; however, its spatial structure is noticeably shaped by nonlocal transport effects. The electron stress tensor remains significantly smaller than that of the ions for all values of 𝑍 considered. Ion overheating in the compression layer is observed to scale approximately linearly with 𝑍. Both findings diverge from hydrodynamic models based on classical electron stress formulations. In conclusion, the electrons exhibit strong nonlocal behavior in the compression layer, with Knudsen numbers approaching unity for 𝑍 β‰₯ 6.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
3009203
Report Number(s):
LLNL--JRNL-2005839
Journal Information:
Physical Review. E, Journal Name: Physical Review. E Journal Issue: 6 Vol. 112; ISSN 2470-0053; ISSN 2470-0045
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

Physics - Plasma physics
Shock waves