title: Gas flow near a smooth plate.
abstract: We examine gas flow adjacent to a molecularly smooth, solid, muscovite mica. The fluctuations in force acting on a glass sphere as a function of proximity to a mica plate were measured in air and were used to obtain the damping. The damping was interpreted as a lubrication force. The measured damping as a function of separation in the slip-flow regime corresponds to a slip length of 480 ± 70 nm, which is equivalent to highly specular gas molecule collisions. A slip-flow model fits the data for separations as small as one mean free path.
authors: Department of Chemical Engineering, Virginia Tech University, Blacksburg, Virginia 24061, USA.
authors: Adam P
authors: AP
authors: Bowles
authors: William A
authors: WA
authors: Ducker