Note on the pairwise interactions of surfactant-covered drops in a uniform electric field
Fluid Dynamics
2020-12-03 v2
Abstract
We study the effect of surfactant on the pairwise interactions of drops in an applied uniform DC electric field using a combination of numerical simulations based on a boundary integral formulation and an analytical theory assuming small drop deformations. The surfactant is assumed to be insoluble in the bulk-phase fluids. We show that the surfactant weakens the electrohydrodynamic flow and thus dielectrophoretic interactions play more prominent role in the dynamics of surfactant-covered drops compared to clean drops. If drop conductivity is the same as the suspending fluid, a nondiffusing surfactant can arrest the drops' relative motion thereby effectively preventing coalescence.
Keywords
Cite
@article{arxiv.2011.00724,
title = {Note on the pairwise interactions of surfactant-covered drops in a uniform electric field},
author = {Chiara Sorgentone and Petia Vlahovska},
journal= {arXiv preprint arXiv:2011.00724},
year = {2020}
}
Comments
arXiv admin note: text overlap with arXiv:2004.05493