Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transition from 2D HD to 2D MHD turbulence   We investigate the critical transition from an inverse cascade of energy to a
forward energy cascade in a two-dimensional magneto-hydrodynamic flow as the
ratio of magnetic to mechanical forcing amplitude is varied. It is found that
the critical transition is the result of two competing processes. The first
process is due to hydrodynamic interactions, cascades the energy to the large
scales. The second process couples small scale magnetic fields to large scale
flows transferring the energy back to the small scales via a non-local
mechanism. At marginality the two cascades are both present and cancel each
other. The phase space diagram of the transition is sketched.

2
The categories of this paper are: math
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg