Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acceleration of Plasma Flows in the Solar Atmosphere Due to Magnetofluid
  Coupling - Simulation and Analysis   Within the framework of a two-fluid description possible pathways for the
generation of fast flows (dynamical as well as steady) in the lower solar
atmosphere is established. It is shown that a primary plasma flow (locally
sub-Alfv\'enic) is accelerated when interacting with emerging/ambient
arcade--like closed field structures. The acceleration implies a conversion of
thermal and field energies to kinetic energy of the flow. The time-scale for
creating reasonably fast flows ($\gtrsim 100$ km/s) is dictated by the initial
ion skin depth while the amplification of the flow depends on local $\beta $.
It is shown, for the first time, that distances over which the flows become
"fast" are $\sim 0.01 R_s$ from the interaction surface; later the fast flow
localizes (with dimensions $\lesssim 0.05 R_S$) in the upper central region of
the original arcade. For fixed initial temperature the final speed ($\gtrsim
500 km/s$) of the accelerated flow, and the modification of the field structure
are independent of the time-duration (life-time) of the initial flow. In the
presence of dissipation, these flows are likely to play a fundamental role in
the heating of the finely structured Solar atmosphere.

13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int