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Molecular Dynamics Study of Diffusion Coefficient for Low-Temperature Dusty Plasmas in the Presence of External Electric Fields

Molecular Dynamics Study of Diffusion Coefficient for Low-Temperature Dusty Plasmas in the Presence of External Electric Fields
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Author(s): Muhammad Asif Shakoori (Xi'an Jiaotong University, China), Maogang He (Xi'an Jiaotong University, China), Aamir Shahzad (Government College University, Faisalabad, Pakistan), Misbah Khan (Xi'an Jiaotong University, China) and Ying Zhang (Xi'an Jiaotong University, China)
Copyright: 2022
Pages: 22
Source title: Emerging Developments and Applications of Low Temperature Plasma
Source Author(s)/Editor(s): Aamir Shahzad (Government College University, Faisalabad, Pakistan) and Maogang He (Xi'an Jiaotong University, China)
DOI: 10.4018/978-1-7998-8398-2.ch004

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Abstract

The effects of external electric field (E) on the diffusion coefficient of dust particles in low-temperature dusty plasmas (LT-DPs) have been computed through nonequilibrium molecular dynamics (NEMD) simulations. The new simulation result was obtained by employing the integral formula of velocity autocorrelation functions (VACF) using the Green-Kubo relation. The normalized self-diffusion coefficient (D*) is investigated for different combinations of plasma coupling (Γ) and Debye screening (κ) parameters. The simulation outcome shows that the decreasing position of D* shifts toward Γ and also increased with the increase of κ. The D* linearly decreased with Γ and increased when applied external E increases. It is observed that the increasing trend of D* depends on the E strength. These investigations show that the present algorithm provides precise data with fast convergence and effects of κ, Γ, E. It is shown that the current NEMD techniques with applied external E can be employed to understand the microscopic mechanism of dusty plasmas.

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