Thermally-driven flows between a Leidenfrost solid and a ratchet surface
Fluid Dynamics
2013-08-09 v1
Abstract
The significance of thermally-driven flows for the propulsion of Leidenfrost solids on a ratchet surface is studied based on a numerical solution of the Boltzmann equation. In contrast to a previous analysis, it is found that no significant thermal creep flow is established. Instead, the flow pattern is dominated by thermal edge and thermal-stress slip flow, the latter being directed opposite to thermal creep flow. However, in total thermally-induced flows only make a minor contribution to the propulsion of Leidenfrost solids on ratchet surfaces which is dominated by the pressure-driven flow due to the sublimating solid.
Keywords
Cite
@article{arxiv.1208.5657,
title = {Thermally-driven flows between a Leidenfrost solid and a ratchet surface},
author = {Steffen Hardt and Sudarshan Tiwari and Tobias Baier},
journal= {arXiv preprint arXiv:1208.5657},
year = {2013}
}