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The effects of viscosity and small-scale atomic-level mixing on plasmas ininertial confinement fusion (ICF) currently represent challenges in ICFresearch. Many current ICF hydrodynamic codes ignore the effects of viscositythough recent research indicates viscosity and mixing by classical transportprocesses may have a substantial impact on implosion dynamics. We haveimplemented a Lagrange hydrodynamic code in one-dimensional spherical geometrywith plasma viscosity and mass transport and including a three temperaturemodel for ions, electrons, and radiation treated in a gray radiation diffusionapproximation. The code is used to study ICF implosion differences with andwithout plasma viscosity and to determine the impacts of viscosity ontemperature histories and neutron yield. It was found that plasma viscosity hassubstantial impacts on ICF shock dynamics characterized by shock burn timing,maximum burn temperatures, convergence ratio, and time history of neutronproduction rates. Plasma viscosity reduces the need for artificial viscosity tomaintain numerical stability in the Lagrange formulation and also modifies theflux-limiting needed for electron thermal conduction.

Plasma Viscosity with Mass Transport in Spherical ICF Implosion Simulations