Diffusion Coefficients of Electrorheological Complex (Dusty) Plasmas

Abstract

Abstract Equilibrium molecular dynamics (EMD) simulations have been executed to investigate the parallel (D║) and perpendicular (D┴) diffusion coefficients for three-dimensional (3D) strongly coupled (SC) electrorheological complex (dusty) plasmas (ERCPs). The effects of uniaxial (z-axis) ac electric field (MT) on dust grains have been investigated along with various combinations of plasma parameters (Γ, κ). The new outcomes obtained by mean squared displacement of Einstein relation show diffusion coefficients for low-intermediate to high plasma couplings (Γ) for varying MT. The D║ and D┴ at MT = 0.01 are agree well with earlier available data obtained from the Green-Kubo and Einstein relation for 3D SC-Yukawa systems. The simulation data show that D║ increase with an increase of moderate MT strength and D┴ decreased for the intermediate to large MT strength Both (D║, D┴) remained nearly constant for low MT values. The investigations show that the current EMD scheme is more efficient for nonideal gas-like, liquids-like and solid-like states of SC-ERCPs. It has been demonstrated that present simulation outcomes extended the MT range up to 0.01 ≤ MT ≤ 10 to understand the diffusive and rheological behavior of dusty plasmas systems.