Molecular dynamics calculation of the thermal conductivity and shear viscosity of the classical one-component plasma

Abstract

The thermal conductivity and shear viscosity of the three-dimensional classical one-component plasma ͑OCP͒ were determined by molecular dynamics experiments. In the simulations the velocity of the particles was spatially modulated, and the transport coefficients were calculated from the relaxation time of the modulation profile. The results are given for the 2р⌫р125 range of the plasma coupling parameter ⌫. The reduced shear viscosity * was found to exhibit a minimum at ⌫ϭ20 in agreement with previous calculations. In the 2р⌫р10 range our method yields * values 20%-50% higher compared to some of the previously obtained data, while very good agreement was found at the position of the minimum of *. The reduced thermal conductivity * exhibits a minimum ͑similarly to *) at ⌫ between 15 and 20. The calculations presented here result in 30%-40% lower thermal conductivity compared to previously available data.

Measurement of Charged-Particle Stopping in Warm Dense Plasma

“…Dense plasmas in the warm-dense matter (WDM) regime, approximately solid density and tens of eV temperature, are of great interest as a probe of stopping-power theories, with broader physics relevance to nonequilibrium statistical mechanics [1], dense plasma transport properties [2][3][4], and bound-free transitions in WDM plasmas [5]. Accurate theory for bound-free transitions is required to interpret data obtained with common laser-plasma diagnostics including Thomson scattering [6] and opacity-based areal density techniques [7].…”

Scaling Law for Shear Viscosity in Yukawa Systems

“…The problems associated with the transport phenomena in the systems of interacting particles are of significant interest in various fields of science [1][2][3][4][5][6][7][8][9]. The self-diffusion, and viscosity constants are fundamental dynamic parameters.…”

“…It is customary to assume that dust particles in a plasma interact through the screened Coulomb potential, ϕ = eZ exp(-r/λ)/r, where r is the distance, λ is the screening radius, and Z is the dust charge [4][5][6][7][8][9]. The numerical simulations [4,5] of these systems demonstrate that, in the case of κ < 6, the value of effective coupling parameter, Г * = (Z e) 2 ( 1+κ+ κ 2 /2) exp(-κ) /(T r р ) fully defines the form of the binary correlation function g(r).…”

The Energy‐Autocorrelation Function in Magnetized and Unmagnetized Strongly Coupled Plasmas

“…The present authors have recently presented a study of the thermal conductivity of magnetized SCPs through equilibrium simulations [32], supplementing similar simulations of unmagnetized SCPs [33][34][35][36][37][38] and studies of weakly coupled magnetized plasmas, e.g., Refs. [39,40].…”