Modeling turbulent energy behavior and sudden viscous dissipation in compressing plasma turbulence

Davidovits, Seth; Fisch, Nathaniel J.

doi:10.1063/1.5006946

Title: Modeling turbulent energy behavior and sudden viscous dissipation in compressing plasma turbulence

Journal Article · 21 December 2017 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5006946 · OSTI ID:1432486

Davidovits, Seth ^[1];

^[2]

Princeton Univ., NJ (United States)
Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Here, we present a simple model for the turbulent kinetic energy behavior of subsonic plasma turbulence undergoing isotropic three-dimensional compression, which may exist in various inertial confinement fusion experiments or astrophysical settings. The plasma viscosity depends on both the temperature and the ionization state, for which many possible scalings with compression are possible. For example, in an adiabatic compression the temperature scales as 1/L², with L the linear compression ratio, but if thermal energy loss mechanisms are accounted for, the temperature scaling may be weaker. As such, the viscosity has a wide range of net dependencies on the compression. The model presented here, with no parameter changes, agrees well with numerical simulations for a range of these dependencies. This model permits the prediction of the partition of injected energy between thermal and turbulent energy in a compressing plasma.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)

Grant/Contract Number:: PHY-1506122; NA0001836

OSTI ID:: 1432486

Alternate ID(s):: OSTI ID: 1414499

Journal Information:: Physics of Plasmas, Vol. 24, Issue 12; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Cited By (4)

Bulk hydrodynamic stability and turbulent saturation in compressing hot spots Davidovits, Seth; Fisch, Nathaniel J. Physics of Plasmas, Vol. 25, Issue 4 https://doi.org/10.1063/1.5026413	journal	April 2018
Understanding turbulence in compressing plasma as a quasi-EOS Davidovits, Seth; Fisch, Nathaniel J. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5098790	journal	June 2019
Viscous dissipation in two-dimensional compression of turbulence Davidovits, Seth; Fisch, Nathaniel J. Physics of Plasmas, Vol. 26, Issue 8 https://doi.org/10.1063/1.5111961	journal	August 2019
Self-consistent feedback mechanism for the sudden viscous dissipation of finite-Mach-number compressing turbulence Campos, A.; Morgan, B. arXiv https://doi.org/10.48550/arxiv.1805.12336	text	January 2018