Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chaotic self-sustaining structure embeded in turbulent-laminar interface   An iterface structure between turbulence and laminar flow is investigated in
two-dimensional channel flow. This spatially localized structure not only
sustains itself, but also converts laminar state into turbulence actively. In
other words, this coherent structure has a functionality to generate
inhomogeneity by its inner dynamics. The dynamics of this functional coherent
structure is isolated using the filtered simulation, and a physical perspective
of its dynamics is summarized in a phenomenological model called an
"ejection-jet" cycle, which includes multiscale interaction process.

31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ