Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental study on wave attenuation by vegetation by means of
  particle imaging velocimetry   Coastal vegetation serves as an ecological defense and plays an important
role when facing marine disaster such as storm surge. In this study, we
investigated experimentally the wave attenuation, including wave height and
wave force decay, and flow field within rigid vegetation by means of particle
imaging velocimetry (PIV). Drag coefficient of vegetation is closely related
the wave attenuation by vegetation. Based on Morison equation, a new modified
direct measurement method to derive the drag coefficient of vegetation was
proposed in this study. This method can eliminate the potential errors and
obtain more accurate drag coefficient to have a well-fitted relationship with
Reynolds number compared with the previous methods. More importantly, we showed
the flow field including instantaneous velocity filed in different wave phase
within the vegetation and turbulent kinetic energy (TKE) field to describe the
mechanisms of wave energy dissipation. In addition, a prediction model to
reproduce the instantaneous TKE was proposed by the work input of vegetation.
The results illustrated that all these characteristics of parameters can help
us understand the effect of the coastal vegetation on wave attenuation better.

18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga