Effective Viscosity, Resistivity, and Reynolds Number in Weakly Collisional Plasma Turbulence
Abstract
We examine dissipation and energy conversion in weakly collisional plasma turbulence, employing in situ observations from the Magnetospheric Multiscale (MMS) mission and kinetic Particle-in-Cell (PIC) simulations of proton-electron plasma. A previous result indicated the presence of viscous-like and resistive-like scaling of average energy conversion rates -- analogous to scalings characteristic of collisional systems. This allows for extraction of collisional-like coefficients of effective viscosity and resistivity, and thus also determination of effective Reynolds numbers based on these coefficients. The effective Reynolds number, as a measure of the available bandwidth for turbulence to populate various scales, links macro turbulence properties with kinetic plasma properties in a novel way.
Keywords
Cite
@article{arxiv.2309.02663,
title = {Effective Viscosity, Resistivity, and Reynolds Number in Weakly Collisional Plasma Turbulence},
author = {Yan Yang and William H. Matthaeus and Sean Oughton and Riddhi Bandyopadhyay and Francesco Pecora and Tulasi N. Parashar and Vadim Roytershteyn and Alexandros Chasapis and Michael A. Shay},
journal= {arXiv preprint arXiv:2309.02663},
year = {2023}
}
Comments
9 pages, 2 figures, 5 tables