Permanent link to this recordhttp://hdl.handle.net/10754/552126
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AbstractWe demonstrate and quantify a highly effective drag reduction technique that exploits the Leidenfrost effect to create a continuous and robust lubricating vapor layer on the surface of a heated solid sphere moving in a liquid. Using high-speed video, we show that such vapor layers can reduce the hydrodynamic drag by over 85%. These results appear to approach the ultimate limit of drag reduction possible by different methods based on gas-layer lubrication and can stimulate the development of related energy saving technologies.
CitationDrag Reduction by Leidenfrost Vapor Layers 2011, 106 (21) Physical Review Letters
PublisherAmerican Physical Society (APS)
JournalPhysical Review Letters
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- Issue date: 2016 Sep 9
- Leidenfrost vapour layer moderation of the drag crisis and trajectories of superhydrophobic and hydrophilic spheres falling in water.
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- Drag crisis moderation by thin air layers sustained on superhydrophobic spheres falling in water.
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- Issue date: 2018 Feb 28
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- Self-determined shapes and velocities of giant near-zero drag gas cavities.
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- Issue date: 2017 Sep