Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prandtl boundary layer expansions of steady Navier-Stokes flows over a
  moving plate   This paper concerns the validity of the Prandtl boundary layer theory in the
inviscid limit for steady incompressible Navier-Stokes flows. The stationary
flows, with small viscosity, are considered on $[0,L]\times \mathbb{R}_{+}$,
assuming a no-slip boundary condition over a moving plate at $y=0$. We
establish the validity of the Prandtl boundary layer expansion and its error
estimates.

9
The categories of this paper are: nlin
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat