Abstract
We 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.
Original language | English |
---|---|
Article number | 214501 |
Journal | Physical Review Letters |
Volume | 106 |
Issue number | 21 |
DOIs | |
State | Published - May 23 2011 |