English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Phase change under reduced environmental pressures is key to understandingliquid discharge and propulsion processes for aerospace applications. Arepresentative case is the sessile water droplets exposed to high vacuum, whichexperience complex phase change and transport phenomena that behave sodifferently than that under the atmosphere. Here, we demonstrate a previouslyunexplored aspect of the mechanism governing icing droplet self-launching fromsuperhydrophobic surfaces when exposed to low pressures (~100 Pa). In contrastto the previously reported recalescence-induced local overpressure underneaththe droplet that propels icing droplet self-jumping, we show that theprogressive recalescence over the free surface plays a significant role indroplet icing and jumping. The joint contribution of the top-down vaporizationmomentum and bottom-up local overpressure momentum leads tovaporization-compression-detaching dynamics of the freezing droplets. Wedelineate the jumping velocity of the icing droplet by analyzing dropletvaporization mediated by freezing and substrate structuring, and reveal jumpingdirection coupled with the spatially probabilistic ice nucleation. Our studyprovides new insights into phase change of supercooled droplets at extremeconditions seen in aerospace and vacuum industries.

Supercooled Droplet Icing and Self-Jumping on Micro/nanostructured Surfaces: Role of Vaporization Momentum