Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rectified motion in an asymmetric channel: the role of hydrodynamic
  interactions with walls   Dynamics of a Brownian particle in an asymmetric micro-channel that is
subjected to an external oscillating force is numerically analyzed. In addition
to the elastic collisions with the walls that are kind of short range
interactions, the long range hydrodynamic influences of the walls have been
considered. We demonstrate how the geometrical parameters of the channel change
the rectified current of the particle. As a result of numerical calculations,
we show that long range hydrodynamic interactions with walls, decrease the
efficiency of the Brownian ratchet.

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The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs