Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical Theory of Magnetohydrodynamic Turbulence: Recent Results   In this review article we will describe recent developments in statistical
theory of magnetohydrodynamic (MHD) turbulence. Kraichnan and Iroshnikov first
proposed a phenomenology of MHD turbulence where Alfven time-scale dominates
the dynamics, and the energy spectrum E(k) is proportional to k^{-3/2}. In the
last decade, many numerical simulations show that spectral index is closer to
5/3, which is Kolmogorov's index for fluid turbulence. We review recent
theoretical results based on anisotropy and Renormalization Groups which
support Kolmogorov's scaling for MHD turbulence.
  Energy transfer among Fourier modes, energy flux, and shell-to-shell energy
transfers are important quantities in MHD turbulence. We report recent
numerical and field-theoretic results in this area. Role of these quantities in
magnetic field amplification (dynamo) are also discussed. There are new
insights into the role of magnetic helicity in turbulence evolution. Recent
interesting results in intermittency, large-eddy simulations, and shell models
of magnetohydrodynamics are also covered.

26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th