Leidenfrost gas ratchets driven by thermal creep
Language
en
Article de revue
This item was published in
Physical Review Letters. 2011-10-13, vol. 107, p. 164502 (4)
American Physical Society
English Abstract
We show that thermal creep is at the origin of the recently discovered Leidenfrost ratchet, where liquid droplets float on a vapor layer along a heated saw-tooth surface and accelerate to velocities of up to 40 cm/s. As ...Read more >
We show that thermal creep is at the origin of the recently discovered Leidenfrost ratchet, where liquid droplets float on a vapor layer along a heated saw-tooth surface and accelerate to velocities of up to 40 cm/s. As the active element, the asymmetric temperature profile at each ratchet summit rectifies the vapor flow in the boundary layer. This mechanism works at low Reynolds number and provides a novel tool for controlling gas flow at nanostructured surfaces.Read less <
Origin
Hal imported