Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weakly Nonlocal Hydrodynamics and the Origin of Viscosity in the
  Adhesion Model   We use the weakly nonlocal hydrodynamics approach to obtain a dynamical
equation for the peculiar velocity field in which the viscosity term is
physically motivated. Based on some properties of the Ginzburg-Landau equation
and the wave mechanics analog of hydrodynamics we find the nonlocal adhesion
approximation taking into account the internal structures of the Zeldovich
pancakes. If the internal structures correspond to significant mesoscopic
fluctuations, viscosity is probably driven by a stochastic force and dynamics
is given by the noisy Burgers equation.

18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci