Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of Slotted Structures on Nonlinear Characteristics of Natural
  Convection in a Cylinder with an Internal Concentric Slotted Annulus   Natural convection in a cylinder with an internally slotted annulus was
solved by SIMPLE algorithm, and the effects of different slotted structures on
nonlinear characteristics of natural convection were investigated. The results
show that the equivalent thermal conductivity Keq increases with Rayleigh
number, and reaches the maximum in the vertical orientation. Nonlinear results
were obtained by simulating the fluid flow at different conditions. With
increasing Rayleigh number, heat transfer is intensified and the state of heat
transfer changes from the steady to unsteady. We investigated different slotted
structures effects on natural convection, and analyze the corresponding
nonlinear characteristics.

25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom