Closed-Field Coronal Heating Driven by Wave Turbulence release_57lsyy6gbzbapkptrczhui5kli

by Cooper Downs, Roberto Lionello, Zoran Mikić, Jon A. Linker, Marco Velli

Released as a article .

2016  

Abstract

To simulate the energy balance of coronal plasmas on macroscopic scales, we often require the specification of the coronal heating mechanism in some functional form. To go beyond empirical formulations and to build a more physically motivated heating function, we investigate the wave-turbulence-driven (WTD) phenomenology for the heating of closed coronal loops. Our implementation is designed to capture the large-scale propagation, reflection, and dissipation of wave turbulence along a loop. The parameter space of this model is explored by solving the coupled WTD and hydrodynamic evolution in 1D for an idealized loop. The relevance to a range of solar conditions is also established by computing solutions for over one hundred loops extracted from a realistic 3D coronal field. Due to the implicit dependence of the WTD heating model on loop geometry and plasma properties along the loop and at the footpoints, we find that this model can significantly reduce the number of free parameters when compared to traditional empirical heating models, and still robustly describe a broad range of quiet-sun and active region conditions. The importance of the self-reflection term in producing relatively short heating scale heights and thermal nonequilibrium cycles is also discussed.
In text/plain format

Archived Files and Locations

application/pdf   1.2 MB
file_hm7q7kp2krc7nbfg6qgndxyzre
arxiv.org (repository)
web.archive.org (webarchive)
Read Archived PDF
Preserved and Accessible
Type  article
Stage   submitted
Date   2016-10-07
Version   v1
Language   en ?
arXiv  1610.02113v1
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: f26b2196-d28b-4f9f-b542-df42f1d82eec
API URL: JSON