Gas-induced friction and diffusion of rigid rotors
Statistical Mechanics
2018-05-29 v2
Abstract
We derive the Boltzmann equation for the rotranslational dynamics of an arbitrary convex rigid body in a rarefied gas. It yields as a limiting case the Fokker-Planck equation accounting for friction, diffusion, and nonconservative drift forces and torques. We provide the rotranslational friction and diffusion tensors for specular and diffuse reflection off particles with spherical, cylindrical, and cuboidal shape, and show that the theory describes thermalization, photophoresis, and the inverse Magnus effect in the free molecular regime.
Keywords
Cite
@article{arxiv.1802.08302,
title = {Gas-induced friction and diffusion of rigid rotors},
author = {Lukas Martinetz and Klaus Hornberger and Benjamin A. Stickler},
journal= {arXiv preprint arXiv:1802.08302},
year = {2018}
}
Comments
13 pages, corrected typos, extended caption of Fig. 2