Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Marine crustaceans with hairy appendages: role of hydrodynamic boundary
  layers in sensing and feeding   Decapod crustaceans have appendages with an array of rigid hairs covered in
chemo-receptors, used to sense and track food. Crustaceans directly influence
the flow behavior by changing the speed of flow past the hairy surface, thereby
manipulating the Reynolds number (Re). Hairs act either as a rake - diverting
flow around the hair array, or as a sieve - filtering flow through the hairs.
In our experiments, we uncover a third transitional phase: deflection - where
the flow partially penetrates the hair array and is deflected laterally. We
develop a reduced order model that predicts the flow phase based on the depth
of the boundary layer on a single hair. This model with no fitting parameters
agrees very well with our experimental data. Additionally, our model agrees
well with measurements of both chemo-sensing and suspension-feeding
crustaceans, and can be generalized for many different geometries.

8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom