Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlocal Form of the Rapid Pressure-Strain Correlation in Turbulent
  Flows   A new fundamentally-based formulation of nonlocal effects in the rapid
pressure-strain correlation in turbulent flows has been obtained. The resulting
explicit form for the rapid pressure-strain correlation accounts for nonlocal
effects produced by spatial variations in the mean-flow velocity gradients, and
is derived through Taylor expansion of the mean velocity gradients appearing in
the exact integral relation for the rapid pressure-strain correlation. The
integrals in the resulting series expansion are solved for high- and
low-Reynolds number forms of the longitudinal correlation function $f(r)$, and
the resulting nonlocal rapid pressure-strain correlation is expressed as an
infinite series in terms of Laplacians of the mean strain rate tensor. The new
formulation is used to obtain a nonlocal transport equation for the turbulence
anisotropy that is expected to provide improved predictions of the anisotropy
in strongly inhomogeneous flows.

8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat