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Title: Constraining Alfvénic turbulence with helicity invariants

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.

Authors:
 [1];  [2]
  1. Institute for Fusion Studies, The University of Texas at Austin, Austin, TX 78712, USA
  2. Department of Aerospace, Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1631477
Grant/Contract Number:  
FG02-04ER54742
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 495 Journal Issue: 3; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Mahajan, Swadesh M., and Lingam, Manasvi. Constraining Alfvénic turbulence with helicity invariants. United Kingdom: N. p., 2020. Web. doi:10.1093/mnras/staa1318.
Mahajan, Swadesh M., & Lingam, Manasvi. Constraining Alfvénic turbulence with helicity invariants. United Kingdom. doi:https://doi.org/10.1093/mnras/staa1318
Mahajan, Swadesh M., and Lingam, Manasvi. Wed . "Constraining Alfvénic turbulence with helicity invariants". United Kingdom. doi:https://doi.org/10.1093/mnras/staa1318.
@article{osti_1631477,
title = {Constraining Alfvénic turbulence with helicity invariants},
author = {Mahajan, Swadesh M. and Lingam, Manasvi},
abstractNote = {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.},
doi = {10.1093/mnras/staa1318},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 495,
place = {United Kingdom},
year = {2020},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1093/mnras/staa1318

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