Constraining Alfvénic turbulence with helicity invariants. Issue 3 (13th May 2020)

• Record Type: Journal Article
• Authors: Mahajan, Swadesh M; Lingam, Manasvi
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 495:Issue 3(2020)
• Page Start: 2771
• Page End: 2776
• Publication Date: 2020-05-13
• Subjects: magnetic fields -- plasmas -- turbulence -- solar wind; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa1318
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: In this paper, we study the constraints imposed by the invariants (generalized helicities and energy) of extended magnetohydrodynamics on some global characteristics of turbulence. We show that the global turbulent kinetic and magnetic energies will approach equipartition only under certain circumstances that depend on the ratio of the generalized helicities. In systems with minimal thermal energy, we demonstrate that the three invariants collectively determine the characteristic length-scale associated with Alfvénic turbulence.