Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simple model for a transverse dune field   We present a simple one-dimensional model to describe the evolution of a
transverse dune field. The model is characterized by the distances between the
dunes and their heights, which determine the inter-dune sand flux. The model
reproduces the observation that the dunes in a given field have approximately
all the same height. We find that this result is independent of the initial
configuration of the field, as well as of coalescence effects between migrating
dunes. The time for the final state to be reached is studied as a function of
the relevant phenomenological parameters.

34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th