Molecular dynamics calculation of thermal conductivity and shear viscosity in two-component fully ionized strongly coupled plasma

Abstract

We present the results of calculations of thermal conductivity and shear-viscosity coefficients of ultracold single charged two-component classical Coulomb plasma by the method of molecular dynamics (MMD). The calculations are carried out in a wide range of Coulomb coupling parameters. The comparison with analytical expressions and calculations of MMD for the model of one-component plasma on a uniform background is presented for conditions where experimental measurements are lacking. The results obtained for our model can be used for any equilibrium or nonequilibrium strongly coupled plasmas, in which quantum effects are negligible.

Thermal conductivity and viscosity in fully ionized multiple-charged strongly coupled plasma

“…A model is considered for a system of charged particles consisting of protons and electrons with a concentration n e = zn i (z is ion charge), interacting according to the Coulomb law and without any restrictions at large or small distances [17][18][19][20]. The calculation of the classical equations of motion is carried out in a cubic cell in a micro-canonical ensemble by means of periodic boundary conditions and the method of the nearest image.…”

“…In this paper, we continue to study the thermal conductivity and viscosity coefficients of fully ionized strongly coupled plasma [20], where our results of calculating the thermal conductivity and viscosity for two-component singly ionized plasma were rather briefly discussed. The results of calculations made by means of the MMD, within the framework of the Green-Kubo formalism, for the thermal conductivity and viscosity coefficients of two-component fully ionized classical Coulomb plasma having ion charges from one to three, calculations performed by means of the MMD, will be presented.…”

“…The results of calculations made by means of the MMD, within the framework of the Green-Kubo formalism, for the thermal conductivity and viscosity coefficients of two-component fully ionized classical Coulomb plasma having ion charges from one to three, calculations performed by means of the MMD, will be presented. In this regard, as in [17][18][19][20], the model of ultracold plasma (UCP) is used, where particles interact according to the Coulomb law without any restrictions at large or small distances. The calculations are carried out in a wide range of the strong coupling parameter.…”

Molecular Dynamics Simulations of Ion Extraction from Nanodroplets for Ionic Liquid Electrospray Thrusters

“…To this end, we have conducted molecular dynamics (MD) simulations, which can analyze the physical motions of atoms and molecules. MD simulations are widely used for many advanced applications [28][29][30][31][32][33] or for obtaining basic physical parameters, such as electrical conductivity [34], surface tension [35], viscosity [36], diffusion coefficient [37], and wettability [38]. They are also employed for ion extraction of electrospray thrusters because electrospray phenomena occur on an atomic scale [35,[39][40][41][42][43].…”

Implementation of neutralizing fields for particle–particle simulations using like charges

“…Recent works have already shown that the PP model is feasible for contributing to real applications that require high accuracy of collisions, e.g. electron-ion temperature relaxation problems occurred in inertial confinement fusion (Zhao 2017(Zhao , 2018a; calculations of conductivity and diffusion coefficients in ultracold plasmas (Bobrov et al 2011;Bobrov, Vorob'ev & Zelener 2018;Bobrov et al 2019Bobrov et al , 2020 and some fundamental non-Maxwellian plasma relaxation problems (Zhao 2018c). In addition, the idea of PP in general has some other beneficial applications.…”