Fragmentation instability of a liquid drop falling inside a heavier miscible fluid

Creators: Buah-Bassuah, Paul; Rojas, René; Residori, Stefania; Arecchi, Fortunato

Others:: Physics Department Univ. Cape Coast ; University of Cape Coast [Ghana]; Institut Non Linéaire de Nice Sophia-Antipolis (INLN) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS); Dipartimento di Fisica e Astronomia [Firenze] ; Università degli Studi di Firenze = University of Florence (UniFI)

Description

We report a new type of drop instability, where the density difference between the drop and the solvent is negative. We show that the drop falls inside the solvent down to a minimum height, then fragmentation takes place and secondary droplets rise up to the surface. We have developed a theoretical model that captures the essential of the phenomenon and predicts the correct scalings for the rise-up time and the minimum height.

Abstract

4 pages

Fragmentation instability of a liquid drop falling inside a heavier miscible fluid

Description

Abstract

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