Ultra-soft liquid-ferrofluid interfaces
Abstract
Soft interfaces are ubiquitous in nature, governing quintessential hydrodynamics functions, like lubrication, stability and cargo transport. It is shown here how a magnetic force field at a magnetic-nonmagnetic fluid interface results in an ultra-soft interface with nonlinear elasticity and tunable viscous shear properties. The balance between magnetic pressure, viscous stress and Laplace pressure results in a deformed and stable liquid-in-liquid tube with apparent elasticity in the range 2 kPa -10 kPa, possibly extended by a proper choice of liquid properties. Such highly deformable liquid-liquid interfaces of arbitrary shape with vanishing viscous shear open doors to unique microfluidic phenomena, biomaterial flows and complex biosystems mimicking.
Cite
@article{arxiv.2408.03392,
title = {Ultra-soft liquid-ferrofluid interfaces},
author = {Arvind Arun Dev and Thomas Hermans and Bernard Doudin},
journal= {arXiv preprint arXiv:2408.03392},
year = {2024}
}
Comments
7 pages , 5 figures. arXiv admin note: text overlap with arXiv:2310.14280