title: Ionic transport in high-energy-density matter.
abstract: Ionic transport coefficients for dense plasmas have been numerically computed using an effective Boltzmann approach. We have developed a simplified effective potential approach that yields accurate fits for all of the relevant cross sections and collision integrals. Our results have been validated with molecular-dynamics simulations for self-diffusion, interdiffusion, viscosity, and thermal conductivity. Molecular dynamics has also been used to examine the underlying assumptions of the Boltzmann approach through a categorization of behaviors of the velocity autocorrelation function in the Yukawa phase diagram. Using a velocity-dependent screening model, we examine the role of dynamical screening in transport. Implications of these results for Coulomb logarithm approaches are discussed.
authors.affiliation: Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: Liam G
authors.initials: LG
authors.lastname: Stanton
authors.affiliation: Computational Physics and Methods Group, MS D413, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Murillo