Self-Organization in a Driven Dissipative Plasma System

TL;DR

This study uses 3-D numerical simulations to explore self-organization in a driven dissipative magneto-plasma, revealing energy cascades, non-force-free states, and complex multi-scale interactions.

Contribution

It introduces a comprehensive 3-D simulation framework capturing nonlinear interactions, energy cascades, and self-organization in a driven dissipative plasma system.

Findings

Demonstrates energy cascade across scales in the plasma.

Confirms the existence of a non-force-free self-organized state.

Shows decay patterns of total energy and dissipation rate.

Abstract

We perform a fully self-consistent 3-D numerical simulation for a compressible, dissipative magneto-plasma driven by large-scale perturbations, that contain a fairly broader spectrum of characteristic modes, ranging from largest scales to intermediate scales and down to the smallest scales, where the energy of the system are dissipated by collisional (Ohmic) and viscous dissipations. Additionally, our simulation includes nonlinear interactions amongst a wide range of fluctuations that are initialized with random spectral amplitudes, leading to the cascade of spectral energy in the inertial range spectrum, and takes into account large scale as well as small scale perturbation that may have been induced by the background plasma fluctuations, also the non adiabatic exchange of energy leading to the migration of energy from the energy containing modes or randomly injected energy driven by perturbations and further dissipated by the smaller scales. Besides demonstrating the comparative decays of total energy and dissipation rate of energy, our results show the existence of a perpendicular component of current, thus clearly confirming that the self-organized state is non-force free.