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

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. We have implemented a Lagrangian hydrodynamic code in one-dimensional spherical geometry with plasma viscosity 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 plasma viscosity and to determine the impacts of viscosity on temperature histories and neutron yield. It was found that plasma viscosity has substantial impacts on ICF shock dynamics characterized by shock burn timing, maximum burn temperatures, convergence ratio, and time history of neutron production rates. Plasma viscosity 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.
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. University of Michigan, Ann Arbor, Michigan 48109 (United States)
  3. University of New Mexico, Albuquerque, New Mexico 87131 (United States)
  4. University of California, Santa Cruz, California 95064 (United States)
  5. Florida State University, Tallahassee, Florida 32306 (United States)
Publication Date:
OSTI Identifier:
22489850
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; CONVERGENCE; DIFFUSION; ELECTRONS; HYDRODYNAMICS; IMPLOSIONS; INERTIAL CONFINEMENT; IONS; LAGRANGIAN FUNCTION; MASS TRANSFER; NEUTRONS; ONE-DIMENSIONAL CALCULATIONS; PLASMA; SPHERICAL CONFIGURATION; THERMAL CONDUCTION; TRANSPORT THEORY; VISCOSITY