Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic solution for high vorticity regions in incompressible 3D
  Euler equations   Incompressible 3D Euler equations develop high vorticity in very thin
pancake-like regions from generic large-scale initial conditions. In this work
we propose an exact solution of the Euler equations for the asymptotic pancake
evolution. This solution combines a shear flow aligned with an asymmetric
straining flow, and is characterized by a single asymmetry parameter and an
arbitrary transversal vorticity profile. The analysis is based on detailed
comparison with numerical simulations performed using a pseudo-spectral method
in anisotropic grids of up to 972 x 2048 x 4096.

11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: eess
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc