Fast & Scalded: Capillary Leidenfrost Droplets in micro-Ratches

2013/10/14 by Marin, Alvaro G., del Cerro, Daniel Arnaldo, Römer, Gert-Willem +1
#FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn)

paper · doi:10.48550/arxiv.1310.3583

Abstract

In this Fluid Dynamics Videos submitted to the 31st Gallery of Fluid Motion, (find a different version here http://youtu.be/CS0c05WQ_js) we illustrate the special dynamics of capillary self-propelled Leidenfrost droplets in micrometric Ratchets. In order to be able to propel water droplets of sizes of the order of 1 mm, micro-ratchets were produced by direct material removal using a picosecond pulsed laser source. Surface micro-patterning with picosecond laser pulses allows creating a well controlled topography on a variety of substrates, with a resolution typically in the micron range. More information can be found in references.

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