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

Collisions between a stream of drops and a continuous jet of a differentliquid are experimentally investigated. In contrast to previous studies, ourwork focuses on the effects of liquid miscibility and wettability on thecollision outcomes. Thus, miscible and immiscible liquids providing total andpartial wetting are used. We show that, as long as the jet surface tension issmaller than the drop surface tension, the drops can be encapsulated by thejet, providing the so-called drops-in-jet structure. The transitions betweenthe different regimes remain similar in nature with a capillary fragmentationresponsible for the jet break-up and an inertial fragmentation causing thedrops (and then possibly the jet) to break up. The dimensionless numbersproposed in the literature to model the inertial fragmentation thresholds donot bring the results obtained with different liquids at the same criticalvalue. We explain the reason via a detailed analysis of the collisions,accounting for the drop and jet extensions and their kinetics. The dropfragmentation is found to occur during the recoil phase, leading us to proposea new dimensionless parameter that successfully reproduced all our experimentaldata obtained with immiscible liquids. Finally we demonstrate that the mostdramatic change of the collision outcomes is produced by using drops thattotally wet the jet. In this case, the encapsulation of the drops cannot beachieved, constituting a true limit to some applications based on thesolidification of the drops-in-jet structure.

Influence of liquid miscibility and wettability on the structures produced by drop-jet collisions