Flow pattern in the vicinity of self-propelling hot Janus particles
Soft Condensed Matter
2014-01-29 v1
Abstract
We study the temperature field and the resulting flow pattern in the vicinity of a heated metal-capped Janus particle. If its thickness exceeds about 10 nm, the cap forms an isotherm and the flow pattern comprises a quadrupolar term that decays with the square of the inverse distance 1/r^2. For much thinner caps the velocity varies as 1/r^3. These findings could be relevant for collective effects in dense suspensions and for the circular tracer motion observed recently in the vicinity of a tethered Janus particle.
Keywords
Cite
@article{arxiv.1401.7311,
title = {Flow pattern in the vicinity of self-propelling hot Janus particles},
author = {Thomas Bickel and Arghya Majee and Alois Würger},
journal= {arXiv preprint arXiv:1401.7311},
year = {2014}
}
Comments
5 pages, 5 figures