Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulated evolution of three-dimensional magnetic nulls leading to
  generation of cylindrically-shaped current sheets   The performed magnetohydrodynamic simulation examines the importance of
magnetofluid evolution which naturally leads to current sheets in the presence
of three-dimensional (3D) magnetic nulls. Initial magnetic field is constructed
by superposing a 3D force-free field on a constant axial magnetic field. The
initial field supports 3D magnetic nulls having classical spine axis and
dome-shaped fan surface; and exerts non-zero Lorentz force on the magnetofluid.
Importantly, the simulation identifies the development of current sheets near
the 3D magnetic nulls. The morphology of the current sheets is similar to a
cylindrical surface where the surface encloses the spine axis. The development
is because of favorable deformation of magnetic field lines constituting the
dome-shaped fan surface. The deformation of field lines is found to be caused
from the flow generated by magnetic reconections at current sheets which are
located away from the cylindrically-shaped current sheets.

29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci