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Leidenfrost Rotors on Turbine-Like Surfaces

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Original languageEnglish
Number of pages1
Publication statusPublished - 2019
EventNature Inspired Surface Engineering 2019 - New York, United States
Duration: 11 Jun 201914 Jun 2019


ConferenceNature Inspired Surface Engineering 2019
CountryUnited States
CityNew York
Internet address


Recently, it has been suggested that for deep-space applications locally available resources (ices of H2O, CO2 and CH4) on the surfaces of planetary bodies could be sources for use in sublimation[1]. The abundance of such resources is highlighted by the hypothesis that the “Gullies on Mars” may have been carved by slabs of solid CO2 sliding downslope due to destabilization by sublimation of vaporduringthespring[2].Inspiredbytheexistenceofthelowerpressures,significanttemperature differencesandabundanceoficesthatcanoccurinsomeextremeenvironments,wehavedeveloped the concept of a Leidenfrost heat engine using frictionless motion on a turbine-inspired surface[3].HerewepresentaLeidenfrostrotor,whereasolidcomponentiscoupledtoarotatingliquidvolume using surface tension and levitated in continuous operation over the turbine-inspired substrate [4]. We show the liquid can be continuously replenished andthat a superhydrophobic coating to the substrate can reduce the operating temperature. By improving the wettability of the solid component,wedemonstratetheeffectofenhancedcouplingwiththeliquidontherotationstability. Becausetheliquidactsasaworkingsubstance,extractingheatfromthesubstratetoproduceuseful work in the form of rotation of the coupled solid component, our results demonstrate that a Leidenfrost heat and mechanical engine operating in a closed thermodynamic cycle ispossible.


Nature Inspired Surface Engineering 2019


New York, United States

Event: Conference

ID: 138534653