Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A quasi-local measure of inter-scale transfer: An approach to
  understanding turbulence   Many questions remain in turbulence research---and related fields---about the
underlying physical processes that transfer scalar quantities, such as the
kinetic energy, between different length scales. Measurement of an
ensemble-averaged flux between scales has long been possible using a variety of
techniques, but instantaneous, spatially-local realizations of the transfer
have not. The ability to visualize scale-to-scale transfer as a field quantity
is crucial for developing a clear picture of the physics underlying the
transfer processes and the role played by flow structure. A general technique
for obtaining these scale-to-scale transfer fields, called the filter approach,
is described. The effects of different filters, finite system size, and limited
resolution are explored for experimental and numerical data of two-dimensional
turbulence.

27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int