Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced inverse-cascade of energy in the averaged Euler equations   For a particular choice of the smoothing kernel, it is shown that the system
of partial differential equations governing the vortex-blob method corresponds
to the averaged Euler equations. These latter equations have recently been
derived by averaging the Euler equations over Lagrangian fluctuations of length
scale $\a$, and the same system is also encountered in the description of
inviscid and incompressible flow of second-grade polymeric (non-Newtonian)
fluids. While previous studies of this system have noted the suppression of
nonlinear interaction between modes smaller than $\a$, we show that the
modification of the nonlinear advection term also acts to enhance the
inverse-cascade of energy in two-dimensional turbulence and thereby affects
scales of motion larger than $\a$ as well. This latter effect is reminiscent of
the drag-reduction that occurs in a turbulent flow when a dilute polymer is
added.

13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs