Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial characterization of turbulent channel flow via complex networks   A network-based analysis of a turbulent channel flow numerically solved at
$Re_\tau=180$ is proposed as an innovative perspective for the spatial
characterization of the flow field. Two spatial networks corresponding to the
streamwise and wall-normal velocity components are built, where nodes represent
portions of volume of the physical domain. For each network, links are active
if the correlation coefficient of the corresponding velocity component between
pairs of nodes is sufficiently high, thus unveiling the strongest kinematic
relations. Several network measures are studied in order to explore the
interrelations between nodes and their neighbors. Specifically, long-range
links are localized between near-wall regions and associated with the temporal
persistence of coherent patterns, namely high and low speed streaks.
Furthermore, long-range links play a crucial role as intermediary for the
kinematic information flow, as emerges from the analysis of indirect
connections between nodes. The proposed approach provides a framework to
investigate spatial structures of the turbulent dynamics, showing the full
potential of complex networks. Although the network analysis is based on the
two-point correlation, it is able to advance the level of information, by
exploiting the texture created by active links in all directions. Based on the
observed findings, the current approach can pave the way for an enhanced
spatial interpretation of the turbulence dynamics.

8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph