Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A smoothed particle hydrodynamics algorithm for multigrain dust with
  separate sets of particles   We present a method for simulating the dynamics of a mixture of gas and
multiple species of large Stokes number dust grains, typical of evolved
protoplanetary discs and debris discs. The method improves upon earlier
methods, in which only a single grain size could be represented, by capturing
the differential backreaction of multiple dust species on the gas. This effect
is greater for large dust-to-gas ratios that may be expected in the later
stages of the protoplanetary disc life. We benchmark the method against
analytic solutions for linear waves, drag and shocks in dust-gas mixtures, and
radial drift in a protoplanetary disc showing that the method is robust and
accurate.

37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg