Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of the surface shape of a large space body on its fragmentation
  in a planetary atmosphere   Employing the finite element and computational fluid dynamics methods, we
have determined the conditions for the fragmentation of space bodies or
preservation of their integrity when they penetrate into the Earth's
atmosphere. The origin of forces contributing to the fragmentation of space
iron bodies during the passage through the dense layers of the planetary
atmosphere has been studied. It was shown that the irregular shape of the
surface can produce transverse aerodynamic forces capable of causing
deformation stress in the body exceeding the tensile strength threshold of
iron.

17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph