Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A physics-inspired alternative to spatial filtering for large-eddy
  simulations of turbulent flows   Large-eddy simulations (LES) are widely-used for computing high Reynolds
number turbulent flows. Spatial filtering theory for LES is not without its
shortcomings, including how to define filtering for wall-bounded flows,
commutation errors for non-uniform filters, and extensibility to flows with
additional complexity, such as multiphase flows. In this paper, the theory for
LES is reimagined using a coarsening procedure that imitates nature. This
physics-inspired approach is equivalent to Gaussian filtering for single-phase
wall-free flows but opens up new insights for modeling even in that simple
case. Boundaries and nonuniform resolution can be treated seemlessly in this
framework without commutation errors, and the divergence-free condition is
retained for incompressible flows. An alternative to the Germano identity is
introduced and used to define a dynamic procedure without the need for a test
filter. Potential extensions to more complex physics are briefly discussed.

32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat