The bounce-splash of a viscoelastic drop

TL;DR

This fluid dynamics video captures the collision and rebound of viscoelastic drops against a wall, revealing initial splashing followed by recoil and bounce, highlighting unique viscoelastic behaviors.

Contribution

The video demonstrates the dynamic behavior of viscoelastic drops during collision, showing splash and recoil phenomena not observed in Newtonian drops.

Findings

Drops splash upon contact similar to Newtonian fluids

Recoil occurs after initial splash, leading to bounce

Viscoelastic properties influence collision dynamics

Abstract

This is an entry for the Gallery of Fluid Motion of the 61st Annual Meeting of the APS-DFD (fluid dynamics videos). This video shows the collision and rebound of viscoelastic drops against a solid wall. Using a high speed camera, the process of approach, contact and rebound of drops of a viscoelastic liquid is observed. We found that these drops first splash, similar to what is observed in Newtonian colliding drops; after a few instants, the liquid recoils, recovering its original drop shape and bounce off the wall.