Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-fluid single-column modelling of Rayleigh-B\'{e}nard convection as a
  step towards multi-fluid modelling of atmospheric convection   Multi-fluid models have recently been proposed as an approach to improving
the representation of convection in weather and climate models. This is an
attractive framework as it is fundamentally dynamical, removing some of the
assumptions of mass-flux convection schemes which are invalid at current model
resolutions. However, it is still not understood how best to close the
multi-fluid equations for atmospheric convection. In this paper we develop a
simple two-fluid, single-column model with one rising and one falling fluid. No
further modelling of sub-filter variability is included. We then apply this
model to Rayleigh-B\'{e}nard convection, showing that, with minimal closures,
the correct scaling of the heat flux (Nu) is predicted over six orders of
magnitude of buoyancy forcing (Ra). This suggests that even a very simple
two-fluid model can accurately capture the dominant coherent overturning
structures of convection.

18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex