Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse transfer of magnetic helicity in direct numerical simulations of
  compressible isothermal turbulence: helical transfers   The role of the different helical components of the magnetic and velocity
fields in the inverse spectral transfer of magnetic helicity is investigated
through Fourier shell-to-shell transfer analysis. Both magnetic helicity and
energetic transfer analysis are performed on chosen data from direct numerical
simulations of homogeneous isothermal compressible magnetohydrodynamic
turbulence, subject to both a large-scale mechanical forcing and a small-scale
helical electromotive driving. The root mean square Mach number of the
hydrodynamic turbulent steady-state taken as initial condition varies from 0.1
to about 11. Three physical phenomena can be distinguished in the general
picture of the spectral transfer of magnetic helicity towards larger spatial
scales: local inverse transfer, non-local inverse transfer and local direct
transfer. A shell decomposition allows to associate these three phenomena with
clearly distinct velocity scales while the helical decomposition allows to
establish the role of the different helical components and the compressive part
of the velocity field on the different transfer processes. The locality and
relative strength of the different helical contributions are mainly determined
by the triad helical geometric factor.

27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc