Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rayleigh-Benard convection in a nonuniformly rotating electrically
  conductive medium in an external spiral magnetic field   The research is devoted to the stability of convective flow in a nonuniformly
rotating layer of an electrically conducting fluid in a spiral magnetic field.
The stationary and oscillatory modes of magnetic convection are considered
depending on the profile of the angular rotation velocity (Rossby number
$\textrm{Ro}$) and on the profile of the external azimuthal magnetic field
(magnetic Rossby number $\textrm{Rb}$). The nonlinear dynamic system of Lorentz
type equations is obtained by using the Galerkin method. Numerical analysis of
these equations has shown the presence of chaotic behavior of convective flows.
The criteria of the occurrence of chaotic movements are found. It depends on
the parameters of convection: dimensionless numbers of Rayleigh $\textrm{Ra}$,
Chandrasekhar $\textrm{Q}$, Taylor $\textrm{Ta}$, and external azimuthal
magnetic field with the Rossby magnetic number $\textrm{Rb}=-1$ for Rayleigh
$(\textrm{Ro}=-1)$ and Kepler $(\textrm{Ro}=-3/4)$ profiles of the angular
rotation velocity of the medium.

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The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs