Molecular dynamics simulations of thermal conductivity in 2D complex Yukawa liquids

Shahzad, Aamir; Sultana, Mariam; Aslam, Arffa; He, Maogang

doi:10.1088/1757-899x/60/1/012038

Cited by 3 publications

References 16 publications

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Numerical experiment of thermal conductivity in two-dimensional Yukawa liquids

Shahzad

2015

Physics of Plasmas

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A newly improved homogenous nonequilibrium molecular dynamics simulation (HNEMDS) method, proposed by the Evans, has been used to compute the thermal conductivity of two-dimensional (2D) strongly coupled complex (dusty) plasma liquids (SCCDPLs), for the first time. The effects of equilibrium external field strength along with different system sizes and plasma states (Γ, κ) on the thermal conductivity of SCCDPLs have been calculated using an enhanced HNEMDS method. A simple analytical temperature representation of Yukawa 2D thermal conductivity with appropriate normalized frequencies (plasma and Einstein) has also been calculated. The new HNEMDS algorithm shows that the present method provides more accurate results with fast convergence and small size effects over a wide range of plasma states. The presented thermal conductivity obtained from HNEMDS method is found to be in very good agreement with that obtained through the previously known numerical simulations and experimental results for 2D Yukawa liquids (SCCDPLs) and with the three-dimensional nonequilibrium molecular dynamics simulation (MDS) and equilibrium MDS calculations. It is shown that the HNEMDS algorithm is a powerful tool, making the calculations very efficient and can be used to predict the thermal conductivity in 2D Yukawa liquid systems.

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Numerical experiment of thermal conductivity in two-dimensional Yukawa liquids

Shahzad

2015

Physics of Plasmas

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Numerical Approach to Thermal Conductivity of Electrorheological Complex (Dusty) Plasmas

Shakoori,

Khan,

et al. 2024

Emerging Applications of Plasma Science in Allied Technologies

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Electrorheological complex (dusty) plasmas (ER-CDPs) are type of plasmas with rheological behavior under external electric field (EEF). In this chapter, the nonequilibrium molecular dynamics simulations method is used to tune thermal conductivity for two-dimensional (2D) complex plasma liquids using EEF in different directions. Anisotropic thermal conductivity is investigated in three different cases, (i) Ex(x-axis), (ii) Ey(y-axis), and (iii) Exy(xy-axis) and with constant external perturbation force (Px = 0.02). The thermal conductivity under the influence of EEF is different in different directions. Obtained results are compared and discussed with previous known theoretical, simulation, and experimental data for 2D systems in constant EEF. The appropriate normalized thermal conductivity with Einstein frequency at constant EEF follows universal temperature scaling law. These comparisons and discussions show that algorithms of EEF of different cases with Yukawa potential have accuracy and consistency. These comparisons validated a new numerical model that can be used for variations of EEF along with different system sizes and plasma parameters.

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Thermal Conductivity of Dusty Plasmas through Molecular Dynamics Simulations

Shahzad¹,

Khan²,

Shakoori³

et al. 2020

Thermophysical Properties of Complex Materials

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The studies of strongly coupled complex plasmas are of significant in the area of science and technology. The plasma thermal conductivity strongly coupled (complex) plasmas is of significant in scientific technology, because it behaves as complex fluids. The two-dimensional (2D) plasma thermal conductivity of strongly coupled complex dusty plasmas (SCCDPs) has been investigated by using the homogenous nonequilibrium molecular dynamics (HNEMD) simulations, proposed by Evan-Gillan scheme, at higher screening parameter к. In our case, we have chosen particularly higher screening strength (к) for calculating plasma thermal conductivity. The new simulations of plasma thermal conductivity are computed over an extensive range of plasma states (Г, к) for suitable system sizes by applying the HNEMD simulation method at constant external force field strength (F * ). It is found that the plasma thermal conductivity of SCCDP S decreases by increasing plasma states (Г, к). The calculations show that the kinetic energy of SCCDP S depends upon the system temperature (1/Г) and it is independent of к for higher screening parameter. The new results of thermal conductivity obtained from an improved HNEMD algorithm are in satisfactory agreement with earlier known numerical results and experimental data for 2D SCCDP S . It is depicted that the HNEMD method is a powerful tool to calculate an accurate plasma thermal conductivity of 2D SCCDP S .

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Molecular dynamics simulations of thermal conductivity in 2D complex Yukawa liquids

Cited by 3 publications

References 16 publications

Numerical experiment of thermal conductivity in two-dimensional Yukawa liquids

Numerical experiment of thermal conductivity in two-dimensional Yukawa liquids

Numerical Approach to Thermal Conductivity of Electrorheological Complex (Dusty) Plasmas

Thermal Conductivity of Dusty Plasmas through Molecular Dynamics Simulations

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