Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytical solutions for Navier-Stokes equations with $\psi$-Caputo
  fractional derivative   This work aims to use the homotopy analysis method to obtain analytical
solutions of linear time-fractional Navier-Stokes equations with cylindrical
coordinates and of a system of nonlinear time-fractional Navier-Stokes
equations with Cartesian coordinates. These equations are described in the
$\psi$-Caputo time-fractional derivative. The solutions obtained for
time-fractional Navier-Stokes equations are graphically presented.

29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph