Thermal Conductivity and Non-Newtonian Behavior of Complex Plasma Liquids

Abstract

Understanding of thermophysical properties of complex liquids under various conditions is of practical interest in the ield of science and technology. Thermal conductivity of nonideal complex (dusty) plasmas (NICDPs) is investigated by using homogeneous nonequilibrium molecular dynamics (HNEMD) simulation method. New investigations have shown, for the irst time, that Yukawa dusty plasma liquids (YDPLs) exhibit a non-Newtonian behavior expressed with the increase of plasma conductivity with increasing external force ield strength F ext . The observations for latice correlation functions Ψ (t) show, that our YDPL system remains in strongly coupled regime for a complete range of plasma states of (Γ, κ), where (Γ) Coulomb coupling and (κ) Debye screening length. It is demonstrated, that the present NICDP system follows a simple scaling law of thermal conductivity. It has been shown, that our new simulations extend the range of F ext used in the earlier studies in order to ind out the size of the linear ranges. It has been shown that obtained results at near equilibrium (F ext = 0.005) are in satisfactory agreement with the earlier simulation results and with the presented reference set of data showed deviations within less than ±15% for most of the present data points and generally overpredicted thermal conductivity by 3-22%, depending on (Γ, κ).

Large Scale Simulations for Dust Acoustic Waves in Weakly Coupled Dusty Plasmas

“…WCDP lacks a defined shape due to the extremely weak interactions between interacting particles at high temperatures and low densities. The EMD simulation has been used to examine the occurrence of diffusion motion in WCDPs [6].…”

“…With Fourier transformation π r, t ðÞ ¼ X j v j e Àik:r j t ðÞ (6) Fourier transform equation is used to measure the LCC function.…”

Introductory Chapter: A Novel Approach to Compute Thermal Conductivity of Complex System

“…Due to the atoms' oscillations, phonons of different wavelengths and frequencies are created in solids, and these phonons would disappear when the oscillations stop. Especially, nanotechnology (nanomaterials) requires the accurate calculation of heat transport features [10,11]. Molecular simulation is recognized as substantial for microand nano-scale heat transport phenomena.…”

Sound Waves in Complex (Dusty) Plasmas

“…In the ideal plasma, the value of Coulomb coupling is negligible. Due to low density, the collisions between particles are less, and ideal plasma does not have a specific structure [8,9].…”

“…In this chapter, the EMD simulation technique has been used to investigate the longitudinal current correlation and transverse current correlation that are given in Eqs. (9) and (10), respectively. The dimensions of simulation box are chosen as L x, L Y, L Z .…”