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Dynamic Characteristics of Strongly Coupled Nonideal Plasmas

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Abstract

Three-dimensional (3D) strongly coupled nonideal plasma systems (SC-NIPSs) are modeled using equilibrium molecular dynamics (EMD) simulations. The dynamical structure factor (DSF) has been investigated under influence of varying wave vectors (k = 2π/L) at high Debye screening (κ) and varying Coulomb couplings (Γ) from nonideal phase to strongly coupled phase. New outcomes of dust DSF S(k,ω) indicate that the frequency of oscillation increases and amplitude decreases with an increase in Γ, respectively, for the SC-NIPSs. The present work shows that the amplitude of dust DSF slightly increases with increasing κ and N, and it also depends on variation of wave vectors. Our investigations demonstrate that the amplitude of oscillation of the dust DSF is changed and shape of spectrum switches from damped oscillation mode to sinusoidal mode with an increase in Γ. These modes of oscillation of dust DSF S(k,ω) shift to higher Γ with increasing κ and N. It has been revealed that the fluctuating density S(k,ω) of dust more oscillates at high Γ and midway value of κ, but this oscillation is less pronounced at high N and κ. The reported simulation data are found to have more precise and well-organized than that of earlier known numerical outcomes and it provides reasonable EMD outcomes with suitable varying N at high screening and large values of Γ than earlier numerical results.

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Data Availability

Data available on 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

This work was partially sponsored by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (No. 51721004). We are grateful to the National Advanced Computing Center of National Center of Physics (NCP), Pakistan, for allocating computer time to test and run our MD code.

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Authors and Affiliations

  1. Modeling and Simulation Laboratory, Department of Physics, Government College University Faisalabad (GCUF), Allama Iqbal Road, Faisalabad, 38040, Pakistan

    Aamir Shahzad, Alina Manzoor, Aadil Mahboob & Muhammad Kashif

  2. School of Astronautics, Beihang University, Beijing, 100191, China

    Weizong Wang

  3. Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education (MOE), Xi’an Jiaotong University, Xi’an, 710049, China

    Aamir Shahzad & Mao-Gang He

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  1. Aamir Shahzad
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  2. Alina Manzoor
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  5. Muhammad Kashif
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  6. Mao-Gang He
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Correspondence to Aamir Shahzad.

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Shahzad, A., Manzoor, A., Wang, W. et al. Dynamic Characteristics of Strongly Coupled Nonideal Plasmas. Arab J Sci Eng 47, 957–969 (2022). https://doi.org/10.1007/s13369-021-05954-4

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