Thermal conductivity of 3D complex (dusty) plasmas using homogenous nonequilibrium modelcular dynamics computer experiment

Abstract

The heat conductivity of three-dimensional Yukawa dusty plasma liquids (YDPLs) has been investigated by employing a modified homogenous nonequilibrium molecular dynamics (HNEMD) technique. The obtained results for Yukawa heat conductivity with suitable normalizations are measured over a wide range of various plasma states of the Coulomb coupling (Γ) and screening length (к) in a canonical ensemble (NVT). The new simulations show that the heat conductivity is dependent on both the Γ and к parameters and the minimum value of thermal conductivity (λ 0 ) shifts towards higher Γ with an increase in к as predictable in earlier work. The calculations for lattice correlations (Ψ) show that our YDPLs system remains in nonideal strongly coupled regime. It has been shown that the presented Yukawa system obeys a simple analytical temperature demonstration of λ 0 with normalized Einstein frequency. The modified HNEMD algorithm is found to have more efficient method than that of earlier equilibrium molecular dynamics (MD) and inhomogenous nonequilibrium MD (InHNEMD) methods and give more satisfactory results with small system sizes. In general, the obtained simulation results at nearly equilibrium external force field value (F∗= 0.005) are in reasonable agreement with earlier equilibrium MD and InHNEMD results within less than ±10 to 20% for most of the present data points.