title: Rectification of thermal fluctuations in ideal gases.
abstract: We calculate the systematic average speed of the adiabatic piston and a thermal Brownian motor, introduced by C. Van den Broeck, R, Kawai and P. Meurs [Phys. Rev. Lett. 93, 090601 (2004)], by an expansion of the Boltzmann equation and compare with the exact numerical solution.
authors.affiliation: Limburgs Universitair Centrum, B-3590 Diepenbeek, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Meurs
authors.forename: C
authors.initials: C
authors.lastname: Van den Broeck
authors.forename: A
authors.initials: A
authors.lastname: Garcia