Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A mass-energy-conserving discontinuous Galerkin scheme for the isotropic
  multispecies Rosenbluth--Fokker--Planck equation   Structure-preserving discretization of the Rosenbluth-Fokker-Planck equation
is still an open question especially for unlike-particle collision. In this
paper, a mass-energy-conserving isotropic Rosenbluth-Fokker-Planck scheme is
introduced. The structure related to the energy conservation is skew-symmetry
in mathematical sense, and the action-reaction law in physical sense. A thermal
relaxation term is obtained by using integration-by-parts on a volume integral
of the energy moment equation, so the discontinuous Galerkin method is selected
to preserve the skew-symmetry. The discontinuous Galerkin method enables ones
to introduce the nonlinear upwind flux without violating the conservation laws.
Some experiments show that the conservative scheme maintains the
mass-energy-conservation only with round-off errors, and analytic equilibria
are reproduced only with truncation errors of its formal accuracy.

34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys