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Diffusion coefficients of electrorheological complex (dusty) plasmas

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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 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║ increased with an increase in moderate MT strength and that D┴ decreased for the intermediate to large MT strength. Both (D║ and D┴) remained nearly constant for low MT values. The investigations show that the current EMD scheme is more efficient for nonideal gas-like, liquid-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 behaviors of dusty plasma systems.

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Data availability

The data are available upon request from the authors: The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

The authors would like to thank Dr. X. D. Zhang at the Network Information Center of Xi’an Jiaotong University for supporting the High-Performance Computing (HPC) platform and HPC Cluster of the National Centre for Physics (NCP) Islamabad for the allocation of computational power to check and run our homemade MD code.

Funding

This work was supported by the National Science Fund for Distinguished Young Scholars of China (No. 51525604) and the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (No. 51721004).

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Authors and Affiliations

  1. Key Laboratory of Thermal Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, Shaanxi, China

    Muhammad Asif Shakoori & Maogang He

  2. Department of Physics, Government College University Faisalabad (GCUF), Allama Iqbal Road, Faisalabad, 38040, Pakistan

    Aamir Shahzad

  3. Department of Refrigeration and Cryogenics Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an,, 710049, China

    Misbah Khan

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  1. Muhammad Asif Shakoori
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Muhammad Asif Shakoori wrote the main text and analyzed it. Maogang He and Aamir Shahzad supervised, reviewed, and edited, and Misbah Khan revised the manuscript.

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Correspondence to Maogang He.

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Shakoori, M.A., He, M., Shahzad, A. et al. Diffusion coefficients of electrorheological complex (dusty) plasmas. J Mol Model 28, 398 (2022). https://doi.org/10.1007/s00894-022-05394-3

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