Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations

Vold, Erik Lehman; Joglekar, Archis S.; Ortega, Mario I.; Moll, Ryan; Fenn, Daniel; Molvig, Kim

doi:10.1063/1.4935906

Title: Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations

Journal Article · Fri Nov 20 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4935906· OSTI ID:1329869

Vold, Erik Lehman ^[1]; Joglekar, Archis S. ^[2]; Ortega, Mario I. ^[3]; Moll, Ryan ^[4]; Fenn, Daniel ^[5]; Molvig, Kim ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Michigan, Ann Arbor, MI (United States)
Univ. of New Mexico, Albuquerque, NM (United States)
Univ. of California, Santa Cruz, CA (United States)
Florida State Univ., Tallahassee, FL (United States)

The effects of viscosity and small-scale atomic-level mixing on plasmas in inertial confinement fusion(ICF) currently represent challenges in ICF research. Many current ICF hydrodynamic codes ignore the effects of viscosity though recent research indicates viscosity and mixing by classical transport processes may have a substantial impact on implosion dynamics. In this paper, we have implemented a Lagrangian hydrodynamic code in one-dimensional spherical geometry with plasmaviscosity and mass transport and including a three temperature model for ions, electrons, and radiation treated in a gray radiation diffusion approximation. The code is used to study ICF implosion differences with and without plasmaviscosity and to determine the impacts of viscosity on temperature histories and neutron yield. It was found that plasmaviscosity has substantial impacts on ICF shock dynamics characterized by shock burn timing, maximum burn temperatures, convergence ratio, and time history of neutron production rates. Finally, plasmaviscosity reduces the need for artificial viscosity to maintain numerical stability in the Lagrangian formulation and also modifies the flux-limiting needed for electron thermal conduction.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1329869

Alternate ID(s):: OSTI ID: 1226676

Report Number(s):: LA-UR-15-24648

Journal Information:: Physics of Plasmas, Vol. 22, Issue 11; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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Yield degradation in inertial-confinement-fusion implosions due to shock-driven kinetic fuel-species stratification and viscous heating Taitano, W. T.; Simakov, A. N.; Chacón, L. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5024402	journal	May 2018
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Multi-species plasma transport in 1D direct-drive ICF simulations Vold, E.; Rauenzahn, R.; Simakov, A. N. Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5083157	journal	March 2019
Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities Zhou, Ye; Clark, Timothy T.; Clark, Daniel S. Physics of Plasmas, Vol. 26, Issue 8 https://doi.org/10.1063/1.5088745	journal	August 2019
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Kinetic physics in ICF: present understanding and future directions Rinderknecht, Hans G.; Amendt, P. A.; Wilks, S. C. Plasma Physics and Controlled Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1361-6587/aab79f	journal	April 2018
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