Studies of weak external force on thermal conductivity of complex liquids using homogenous perturbed simulations
Aamir Shahzad, Muhammad Kashif, Tariq Munir, Muhammad Asif Shakoori, Maogang He, Sajid Bashir and Qamar Ul Islam
A modified Evan-Gillan homogenous perturbed scheme was employed to measure the thermal response and corresponding normalized plasma thermal conductivity (l0) of strongly coupled dusty plasmas (SCDPs). Homogenous perturbed molecular dynamics (HPMD) approach was employed to analyze the efficiency and compared the obtained outcomes of perturbed heat flux vector to the outcomes computed through equilibrium molecular dynamics (EMD) approach. Our new outcomes show that the thermal response of heat energy current through HPMD and EMD approaches is an excellent agreement with each other for SCDPs at much low value of normalized external perturbation (𝑭*). The obtained HPMD simulations demonstrate that the presented approach provides good outcomes with fast convergence and small system size for low-to-intermediate plasma couplings (Γ) at very weak 𝑭*. It was found that the measured plasma λ0 outcomes at nearly equilibrium weak 𝑭* (= 0.00005) are in reasonable agreement with earlier results obtained from EMD, homogenous and inhomogeneous nonequilibrium molecular dynamics simulations and theoretical predictions and generally overpredicted the plasma λ0 by ~1%–~24% depending on the arrangement of plasma parameters (Γ, κ). It was shown that the HPMD is an excellent approach to calculate the plasma λ0 and to recognize the elementary patterns in 3D SCDPs.
Keywords: Thermal response, Perturbed molecular dynamics, Strongly coupled, Complex dusty plasmas, Thermal conductivity, Thermophysical properties