67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

V0045: Electrohydrodynamics of a particle-covered drop

Authors

• Malika Ouriemi, Brown University
• Petia Vlahovska, Brown University

DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.V0045

This video presents the effect of surface-absorbed colloidal particles on the dynamics of a leaky dielectric drop in a uniform DC electric field. Depending on the particle polarizabilty, coverage and the electrical field intensity, particles assemble into various patterns such as an equatorial belt, pole-to-pole chains or a band of dynamic vortices. The diversity of particle patterns provides promising new ideas for directed assembly of particles at interfaces and provides new insights into understanding the impact of particles at fluid interfaces. Our findings open questions ranging from understanding the mechanism for particle organization to stability of Pickering emulsions, and can lead to applications in multiple areas, as diverse as drugs delivery or oil production.