Trapping leidenfrost drops with crenelations.
Drops placed on very hot solids levitate on a cushion of their own vapor, as discovered by Leidenfrost. This confers to these drops a remarkable mobility, which makes problematic their control and manipulation. Here we show how crenelated surfaces can be used to increase the friction of Leidenfrost drops by a factor on the order of 100, making them decelerate and be trapped on centimetric distances instead of the usual metric ones. We measure and characterize the friction force as a function of the design of the crenelations.
PMMH, UMR 7636 du CNRS, ESPCI, 75005 Paris, France.
Guillaume
G
Dupeux
Marie
M
Le Merrer
Christophe
C
Clanet
David
D
Quéré