Dynamic Characteristics of Strongly Coupled Nonideal Plasmas

• Published in: Arabian journal for science and engineering (2011) 2022, Vol.47 (1), p.957-969
• Main Authors: Shahzad, Aamir, Manzoor, Alina, Wang, Weizong, Mahboob, Aadil, Kashif, Muhammad, He, Mao-Gang
• Format: Article
• Language: English
• Subjects: Amplitudes; Couplings; Dust; Dynamic characteristics; Dynamic structural analysis; Engineering; Humanities and Social Sciences; Molecular dynamics; Molecular structure; multidisciplinary; Oscillation modes; Plasmas (physics); Research Article-Physics; Science; Screening; Structure factor; Switches
• ISSN: 2193-567X; 1319-8025; 2191-4281
• DOI: 10.1007/s13369-021-05954-4

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.