Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Steady streamwise transpiration control in turbulent pipe flow   A study of the the main features of low- and high amplitude steady streamwise
wall transpiration applied to pipe flow is presented. The effect of the two
transpiration parameters, amplitude and wavenumber, on the flow have been
investigated by means of direct numerical simulation at a moderate turbulent
Reynolds number. The behaviour of the three identified mechanisms that act in
the flow: modification of Reynolds shear stress, steady streaming and
generation of non-zero mean streamwise gradients, have been linked to the
transpiration parameters. The observed trends have permitted the identification
of wall transpiration configurations able to reduce or increase the overall
flow rate in -36.1% and 19.3% respectively. A resolvent analysis has been
carried out to obtain a description of the reorganization of the flow
structures induced by the transpiration.

33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex