The Energy‐Autocorrelation Function in Magnetized and Unmagnetized Strongly Coupled Plasmas

Ott, Torben; Bönitz, M.

doi:10.1002/ctpp.201500101

Cited by 6 publications

(8 citation statements)

References 50 publications

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“…2 of Ref. [41]). The most notable difference is the absence of persistent oscillations in the pp, vv, and pv terms (labeled pp, cc, and pc in Ref.…”

Section: Simulation Resultsmentioning

confidence: 88%

“…2 of Ref. [41] highlights the role of the long range potential in comparison with the shorter-range κ = 2 Yukawa OCP (hereafter YOCP) at values of Γ where liquid like behavior sets in (Γ = 30 − 300 in Fig. 2 of Ref.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The most notable difference is the absence of persistent oscillations in the pp, vv, and pv terms (labeled pp, cc, and pc in Ref. [41]) of the YOCP. Compared to the YOCP, the magnitude of the pp and vv components of the ACF are closer in magnitude, possibly owing to the larger contribution to the potential term from long range interactions in the OCP.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Testing thermal conductivity models with equilibrium molecular dynamics simulations of the one-component plasma

Scheiner

2019

Phys. Rev. E

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Equilibrium molecular dynamics simulations are used to calculate the thermal conductivity of the one component plasma (OCP) via the Green-Kubo formalism over a broad range of Coulomb coupling strength, 0.1 ≤ Γ ≤ 180. These simulations address previous discrepancies between computations using equilibrium versus nonequilibrium methods. Analysis of heat flux autocorrelation functions show that very long (6 × 10 5 ω −1 p ) time series are needed to reduce the noise level to allow 2% accuracy. The new simulations provide the first accurate data for Γ 1. This enables a test of the traditional Landau-Spitzer theory, which is found to agree with the simulations for Γ 0.3. It also enables tests of theories to address moderate and strong Coulomb coupling. Two are found to provide accurate extensions to the moderate coupling regime of Γ 10, but none are accurate in the Γ 10 regime where potential energy transport and coupling between mass flow and stress dominate thermal conduction.

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“…2 of Ref. [41]). The most notable difference is the absence of persistent oscillations in the pp, vv, and pv terms (labeled pp, cc, and pc in Ref.…”

Section: Simulation Resultsmentioning

confidence: 88%

Section: Simulation Resultsmentioning

confidence: 99%

Section: Simulation Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Testing thermal conductivity models with equilibrium molecular dynamics simulations of the one-component plasma

Scheiner

2019

Phys. Rev. E

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“…The temperature homogenization time scale shows the well-known non-monotonic dependence on the coupling strength Γ which is related to the different modes of thermal diffusion [14,15]. Comparing the isotropization time scale at β = 0 and Γ = 100 (Fig.…”

Section: A Thermal Relaxation Time Scalementioning

confidence: 96%

Spontaneous generation of temperature anisotropy in a strongly coupled magnetized plasma

2017

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A magnetic field was recently shown to enhance field-parallel heat conduction in a strongly correlated plasma whereas cross-field conduction is reduced. Here we show that in such plasmas, the magnetic field has the additional effect of inhibiting the isotropization process between field-parallel and cross-field temperature components, thus leading to the emergence of strong and long-lived temperature anisotropies when the plasma is locally perturbed. An extended heat equation is shown to describe this process accurately.

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“…Due to the strong coupling of these dust particles, the collection of dust particles exhibits behaviors of liquids [23,24] and solids [18,25]. Molecular dynamics (MD) simulations of 2D Yukawa liquids and solids have been widely used to study behaviors of 2D dusty plasmas [16,17,[26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Viscosity of two-dimensional strongly coupled dusty plasma modified by a perpendicular magnetic field

2017

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Transport properties of two-dimensional (2D) strongly coupled dusty plasmas have been investigated in detail, but never for viscosity with a strong perpendicular magnetic field; here, we examine this scenario using Langevin dynamics simulations of 2D liquids with a binary Yukawa interparticle interaction. The shear viscosity η of 2D liquid dusty plasma is estimated from the simulation data using the Green-Kubo relation, which is the integration of the shear stress autocorrelation function. It is found that, when a perpendicular magnetic field is applied, the shear viscosity of 2D liquid dusty plasma is modified substantially. When the magnetic field is increased, its viscosity increases at low temperatures, while at high temperatures its viscosity diminishes. It is determined that these different variational trends of η arise from the different behaviors of the kinetic and potential parts of the shear stress under external magnetic fields.

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The Energy‐Autocorrelation Function in Magnetized and Unmagnetized Strongly Coupled Plasmas

Cited by 6 publications

References 50 publications

Testing thermal conductivity models with equilibrium molecular dynamics simulations of the one-component plasma

Testing thermal conductivity models with equilibrium molecular dynamics simulations of the one-component plasma

Spontaneous generation of temperature anisotropy in a strongly coupled magnetized plasma

Viscosity of two-dimensional strongly coupled dusty plasma modified by a perpendicular magnetic field

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