Tue March 19th 2013
HR W121
Seminar From Jumping Drops to Thermal Diodes
Chuan-Hua Chen


On a superhydrophobic surface, condensate droplets can spontaneously jump off the surface upon coalescence. The self-propelled motion results from the surface energy released upon drop coalescence, while the out-of-plane jumping results from the superhydrophobic substrate breaking the symmetry of energy release. In this talk, we will first illustrate the physical mechanisms of the self-propelled jumping by comparing experimental results with a 3D phase-field simulation. We will then discuss two applications of jumping drops: a new self-cleaning mechanism for water-repellent surfaces that works in the absence of external forces, and a planar phase-change thermal diode that is inherently scalable to large areas.
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The 10th Complex Motion in Fluids 2021
Max Planck Gesellschaft
Centre for Scientific Computing