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Propulsion mechanisms for Leidenfrost solids on ratchets
Abstract : We propose a model for the propulsion of Leidenfrost solids on ratchets based on viscous drag due to the flow of evaporating vapor. The model assumes pressure-driven flow described by the Navier-Stokes equations and is mainly studied in lubrication approximation. A scaling expression is derived for the dependence of the propulsive force on geometric parameters of the ratchet surface and properties of the sublimating solid. We show that the model results as well as the scaling law compare favorably with experiments and are able to reproduce the experimentally observed scaling with the size of the solid. DOI: 10.1103/PhysRevE.87.021001
Cited literature [6 references]
https://hal-polytechnique.archives-ouvertes.fr/hal-00996480
Contributor : Denis Roura <>
Submitted on : Friday, May 30, 2014 - 1:04:57 PM
Last modification on : Wednesday, December 9, 2020 - 3:12:47 PM
Long-term archiving on: : Tuesday, April 11, 2017 - 1:56:02 AM
Contributor : Denis Roura <>
Submitted on : Friday, May 30, 2014 - 1:04:57 PM
Last modification on : Wednesday, December 9, 2020 - 3:12:47 PM
Long-term archiving on: : Tuesday, April 11, 2017 - 1:56:02 AM
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PhysRevE.87.021001.pdf
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