Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How efficient is towing a cargo by a micro-swimmer?   We study the properties of arbitrary micro-swimmers towing a passive load
through a viscous liquid. The simple close-form expression for the dragging
efficiency of a general micro-swimmer dragging a distant load is found, and the
leading order approximation for finite mutual separation is derived. We show
that, while swimmer can be arbitrarily efficient, dragging efficiency is always
bounded from above. It is also demonstrated, that opposite to Purcell's
assumption, the hydrodynamic coupling can ''help" the swimmer to drag the load.
We support our conclusions by rigorous numerical calculations for the
"necklace-shaped" swimmer, towing a spherical cargo positioned at a finite
distance.

21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn