An extended hydrodynamics model for inertial confinement fusion hohlraums

In some inertial confinement fusion hohlraum designs, the inside plasma is not sufficiently collisional to be satisfactorily described by the Euler equations implemented in hydrodynamic simulation codes, particularly in converging regions of the expanding plasma flow. To better treat that situation,...

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Bibliographic Details
Published inThe European physical journal. D, Atomic, molecular, and optical physics Vol. 75; no. 11
Main Author Larroche, O.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2021
Springer Nature B.V
Subjects
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Distribution functions
Euler-Lagrange equation
Expanding plasmas
Fluid flow
Fluid mechanics
Hohlraums
Hydrodynamics
Inertial confinement fusion
Molecular
Optical and Plasma Physics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Regular Article – Plasma Physics
Spectroscopy/Spectrometry
Spintronics
Velocity distribution
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Summary:In some inertial confinement fusion hohlraum designs, the inside plasma is not sufficiently collisional to be satisfactorily described by the Euler equations implemented in hydrodynamic simulation codes, particularly in converging regions of the expanding plasma flow. To better treat that situation, this paper presents an extended hydrodynamics model including higher moments of the particle velocity distribution function, together with physically justified closure assumptions and relaxation terms. A preliminary one-dimensional numerical implementation of the model is shown to give satisfactory results in a test case involving a high-velocity collision of two plasma flows. Paths to extend that model to three dimensions as needed for an actual hohlraum geometry are briefly discussed.
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/s10053-021-00305-2