Yang, YanMatthaeus, William H.Oughton, SeanBandyopadhyay, RiddhiPecora, FrancescoParashar, Tulasi N.Roytershteyn, VadimChasapis, AlexandrosShay, Michael A.2026-08-112026-08-112024Yang, Y., Matthaeus, W. H., Oughton, S., Bandyopadhyay, R., Pecora, F., Parashar, T. N., Roytershteyn, V., Chasapis, A., & Shay, M. A. (2024). Effective viscosity, resistivity, and Reynolds number in weakly collisional plasma turbulence. Monthly Notices of the Royal Astronomical Society, 528(4), 6119-6128. https://doi.org/10.1093/mnras/stae3550035-8711https://hdl.handle.net/10289/18523We examine dissipation and energy conversion in weakly collisional plasma turbulence, employing in situ observations from the Magnetospheric Multiscale mission and kinetic particle-in-cell 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 turbulence macroscale properties with kinetic plasma properties in a novel way.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/mathematicsplasmassolar windSun: heliosphereturbulenceJournal Article10.1093/mnras/stae3551365-29664012 Fluid Mechanics and Thermal Engineering40 Engineering51 Physical Sciences5109 Space Sciences5107 Particle and High Energy Physics5101 Astronomical Sciences51 Physical Sciences5101 Astronomical sciences5107 Particle and high energy physics5109 Space sciences