Ion-scale Transition of Plasma Turbulence: Pressure-Strain Effect

0557402 - ASÚ 2023 RIV GB eng J - Článek v odborném periodiku
Hellinger, Petr - Montagud-Camps, Victor - Franci, L. - Matteini, L. - Papini, E. - Verdini, A. - Landi, S.
Ion-scale Transition of Plasma Turbulence: Pressure-Strain Effect.
Astrophysical Journal. Roč. 930, č. 1 (2022), č. článku 48. ISSN 0004-637X. E-ISSN 1538-4357
Institucionální podpora: RVO:67985815
Klíčová slova: karman-howarth equation * spectral transfer * magnetohydrodynamics
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 4.9, rok: 2022
Způsob publikování: Open access

We investigate properties of solar-wind-like plasma turbulence using direct numerical simulations. We analyze the transition from large, magnetohydrodynamic (MHD) scales to the ion characteristic ones using two-dimensional hybrid (fluid electrons and kinetic ions) simulations. To capture and quantify turbulence properties, we apply the Karman-Howarth-Monin (KHM) equation for compressible Hall-MHD (extended by considering the plasma pressure as a tensor quantity) to the numerical results. The KHM analysis indicates that the transition from MHD to ion scales (the so-called ion break in the power spectrum) results from a combination of an onset of Hall physics and an effective dissipation owing to the pressure-strain energy-exchange channel and resistivity. We discuss the simulation results in the context of the solar wind.
Trvalý link: http://hdl.handle.net/11104/0331627