Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A three-dimensional dynamic mode decomposition analysis of wind farm
  flow aerodynamics   High-fidelity large-eddy simulations are suitable to obtain insight into the
complex flow dynamics in extended wind farms. In order to better understand
these flow dynamics, we use dynamic mode decomposition (DMD) to analyze and
reconstruct the flow field in large-scale numerically simulated wind farms by
large-eddy simulations (LES). Different wind farm layouts are considered, and
we find that a combination of horizontal and vertical staggering leads to
improved wind farm performance compared to traditional horizontal staggering.
We analyze the wind farm flows using the amplitude selection (AP) and
sparsity-promoting (SP method) DMD approach. We find that the AP method tends
to select modes with a small length scale and a high frequency, while the SP
method selects large coherent structures with low frequency. The latter are
somewhat reminiscent of modes obtained using proper orthogonal decomposition
(POD). We find that a relatively limited number of SP-DMD modes is sufficient
to accurately reconstruct the flow field in the entire wind farm, whereas the
AP-DMD method requires more modes to achieve an accurate reconstruction. Thus,
the SP-DMD method has a smaller performance loss compared to the AP-DMD method
in terms of the reconstruction of the flow field.

8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg