Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Angular multiscale statistics of Lagrangian trajectories in turbulence   The angle between subsequent particle displacement increments is evaluated as
a function of the timelag in isotropic turbulence. It is shown that the
evolution of this angle contains two well-defined power-laws, reflecting the
multi-scale dynamics of high-Reynolds number turbulence. The proba-bility
density function of the directional change is shown to be self-similar and well
approximated by an analytically derived model assuming Gaussianity and
independence of the velocity and the Lagrangian acceleration.

33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int