Desorption mediated mechanism of molecular fluid slip: (a) adsorption/re-adsorption from bulk flow (b) adsorbed phase of duration tsurf (c) desorption into bulk flow (d) bulk excursion of duration tbulk where ttotal = tsurf + tbulk.

Desorption mediated mechanism of molecular fluid slip: (a) adsorption/re-adsorption from bulk flow (b) adsorbed phase of duration tsurf (c) desorption into bulk flow (d) bulk excursion of duration tbulk where ttotal = tsurf + tbulk.