Motion of an array of plates in a rarefied gas caused by radiometric force

has been published in Phys. Rev. E 91, 063007

Asymptotic theory of a uniform flow of a rarefied gas past a sphere at low Mach numbers

has been published online. The result can be used to calculate the drag of a tiny spherical particle (say, less than 1 ηm) moving slowly in a gas at a constant velocity.

Asymptotic theory of a uniform flow of a rarefied gas past a sphere at low Mach numbers

Satoshi Taguchi (2015). Journal of Fluid Mechanics, Volume 774, July 2015 pp 363-394 http://journals.cambridge.org/action/displayAbstract?aid=9763692