Breath figures under electrowetting

Ranabir Dey (Speaker)

Activity: Talk or presentationOral presentation

Description

We demonstrate here that droplets condensing on a hydrophobic substrate (breath figures) under electrowetting (EW) form patterns dramatically different from the classical breath figure patterns. Our results reveal that the unique breath figure pattern under EW stems from the spatial alignment of the droplets along the locations of the corresponding electrostatic energy minima. Consequently, the temporal evolution of such droplet pattern is governed by the evolution of the electrostatic energy distribution, as dictated by the coalescence dominated growth in droplet size under EW. Interestingly, such patterns of condensate droplets remain self-similar in time over specific growth periods as demonstrated using the dynamic scaling behaviour of the droplet size distribution. The evaluated dynamic scaling characteristics for breath figures under EW are different from those for classical breath figures due to the large fraction of the multiple droplet coalescence under EW
Period23 Jan 2018 - 24 Jan 2018
Held atPhysics@Veldhoven 2018
Event typeConference
LocationVelhoven, Netherlands