Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic feedback control through wall suction in shear flows   Flow control is of interest in many open and wall-bounded shear flows in
order to reduce drag or to avoid sudden large fluctuations that may lead to
material failure. An established means of control is the application of suction
through a porous wall. Here, we combine suction with a feedback strategy
whereby the suction velocity is adjusted in response to either the kinetic
energy or the shear stress at the bottom wall. The control procedure is then
used in an attempt to stabilize invariant solutions and to carry out direct
numerical simulations with a prescribed value of the friction coefficient.

10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas