Thermal conductivity analysis of two-dimensional complex plasma liquids and crystals

Abstract

A novel homogeneous perturbed non-equilibrium molecular dynamics (HPMD) scheme, proposed by Evan-Gillan, has been employed to calculate the thermal conductivity of two-dimensional (2D) complex plasma liquids and crystals (CPLCs). The thermal conductivity has been reported using an improved HPMD method under the influence of constant external perturbation with different system sizes (N) and combinations of plasma parameters (Γ, κ). The current HPMD scheme provides precise outcomes with fast convergence for small-to-large N effects over a complete range of (Γ, κ). Temperature scaling law is tested for 2D thermal conductivity with appropriate Einstein frequency and found excellent behaviors. New simulations show that the thermal conductivity of CPLCs depends on (Γ, κ) and N and a slightly decreasing behavior is noted for thermal conductivity with increasing Γ and N, but, overall, thermal conductivity becomes constant at intermediate-to-large Γ. The reported thermal conductivity obtained from present HPMD method, in the limit of low equilibrium perturbation, has established a reasonable agreement with that obtained from earlier known 2D numerical and experimental data. It is demonstrated that the present HPMD method is an alternative efficient tool to compute the thermal conductivity of 2D CPLCs and can be a suitable method for complete trends of complex plasmas.

Diffusion coefficients of electrorheological complex (dusty) plasmas

“…Nowadays, the art of MD simulations has become a common computational tool employed to investigate physical properties in various areas of science and technology. The MD simulations follow the equation of motion for the spherical particle systems [2][3][4][5][6]. We have used MD simulations code [42] to calculate the self-diffusion coe cients (D) with Einstein relation.…”

“…Mostly dust grain has a negative charge due to the high mobility of electrons. The Yukawa (screened Coulomb) potential is used to calculate the interaction between dust grains that are produced by the shielding effects of free ions and electrons in the plasma [1][2][3][4][5][6]. The minimal charge-to-mass ratio of dust grains establishes that these particles are coupled and arranged themselves the same as an atom in the liquid and solid-like phases [1].…”

“…CPs have several applications in science and engineering, such as the semiconductors processing, ltration process, paper and petroleum industry, biomechanics, insulation systems, ceramic process, etc. It also plays an important role in nuclear fusion devices [1,5,8].…”

“…Thermophysical properties such as thermal conductivity [2][3][4][5], diffusion [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] and viscosity [38] play an important role in system design, optimization and have various applications in many processes.…”

Polarized Thermal Conductivity of Two-Dimensional Dusty Plasmas

“…One such strategy is to develop new therapeutic materials based on dusty plasma that are more effective. Regulation with approval became a significant issue in modern technology [11]. Yet similar interests are present in plasma fusion, and it can be productive radiotoxic dust in plasma-wall reactions.…”