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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

When a drop of fluid hits a small solid target of comparable size, it expandsradially until reaching a maximum diameter and subsequently recedes. In thiswork, we show that the expansion process of liquid sheets is controlled by acombination of shear (on the target) and biaxial extensional (in the air)deformations. We propose an approach toward a rational description of thephenomenon for Newtonian and viscoelastic fluids by evaluating the viscousdissipation due to shear and extensional deformations, yielding a prediction ofthe maximum expansion factor of the sheet as a function of the relevantviscosity. For Newtonian systems, biaxial extensional and shear viscousdissipation are of the same order of magnitude. On the contrary, for thinningsolutions of supramolecular polymers, shear dissipation is negligible comparedto biaxial extensional dissipation and the biaxial thinning extensionalviscosity is the appropriate quantity to describe the maximum expansion of thesheets. Moreover, we show that the rate-dependent biaxial extensionalviscosities deduced from drop impact experiments are in good quantitativeagreement with previous experimental data and theoretical predictions forvarious viscoelastic liquids.

Competition between shear and biaxial extensional viscous dissipation in the expansion dynamics of Newtonian and rheo-thinning liquid sheets