Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Motion of hydrodynamically interacting active particles   We develop a general hydrodynamic theory describing a system of interacting
actively propelling particles of arbitrary shape suspended in a viscous fluid.
We model the active part of the particle motion using a slip velocity
prescribed on the otherwise rigid particle surfaces. We introduce the general
framework for particle rotations and translations by applying the Lorentz
reciprocal theorem for a collection of mobile particles with arbitrary surface
slip. We then develop an approximate theory applicable to widely separated
spheres, including hydrodynamic interactions up to the level of force
quadrupoles. We apply our theory to a general example involving a prescribed
slip velocity, and a specific case concerning the autonomous motion of
chemically active particles moving by diffusiophoresis due to self-generated
chemical gradients.

36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con