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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We consider a spherical particle levitating above a liquid bath owing to theLeidenfrost effect, where the vapour of either the bath or sphere forms aninsulating film whose pressure supports the sphere's weight. Starting from areduced formulation based on a lubrication-type approximation, we use matchedasymptotics to describe the morphology of the vapour film assuming that thesphere is small relative to the capillary length (small Bond number) and thatthe densities of the bath and sphere are comparable. We find that this regimeis comprised of two formally infinite sequences of distinguished limits whichmeet at an accumulation point, the limits being defined by the smallness of anintrinsic evaporation number relative to the Bond number. These sequences oflimits reveal a surprisingly intricate evolution of the film morphology withincreasing sphere size, starting from the formation of a neck-bubble morphologytypical of a Leidenfrost drop levitating above a flat solid substrate andultimately reaching a uniform-film morphology similar to that in the case of alarge liquid drop levitating above a liquid bath.

Leidenfrost levitation of a spherical particle above a liquid bath: evolution of the vapour-film morphology with particle size