Dripping, jetting and tip streaming

JM Montanero, AM Gañán-Calvo - Reports on Progress in …, 2020 - iopscience.iop.org
Dripping, jetting and tip streaming have been studied up to a certain point separately by both
fluid mechanics and microfluidics communities, the former focusing on fundamental aspects …

Stability and tip streaming of a surfactant-loaded drop in an extensional flow. Influence of surface viscosity

MA Herrada, A Ponce-Torres, M Rubio… - Journal of Fluid …, 2022 - cambridge.org
We study numerically the nonlinear stationary states of a droplet covered with an insoluble
surfactant in a uniaxial extensional flow. We calculate both the eigenfunctions to reveal the …

Dynamics of droplet pinch-off at emulsified oil-water interfaces: Interplay between interfacial viscoelasticity and capillary forces

P Bazazi, HA Stone, SH Hejazi - Physical review letters, 2023 - APS
The presence of submicrometer structures at liquid-fluid interfaces modifies the properties of
many science and technological systems by lowering the interfacial tension, creating …

Dynamics of a surfactant-laden viscoelastic thread in the presence of surface viscosity

F Li, D He - Journal of Fluid Mechanics, 2023 - cambridge.org
As is known, the presence of surfactants can profoundly influence the dynamics of
Newtonian viscous threads. Also, it is known that non-Newtonian viscoelastic threads …

Effects of surface viscosity on breakup of viscous threads

H Wee, BW Wagoner, PM Kamat, OA Basaran - Physical Review Letters, 2020 - APS
In addition to surface tension lowering and Marangoni stresses, surfactants also induce
surface rheological effects when they deform against themselves at fluid interfaces. Because …

Pinch-off of a surfactant-covered jet

H Wee, BW Wagoner, V Garg, PM Kamat… - Journal of Fluid …, 2021 - cambridge.org
Surfactants at fluid interfaces not only lower and cause gradients in surface tension but can
induce additional surface rheological effects in response to dilatational and shear …

Surfactant-driven escape from endpinching during contraction of nearly inviscid filaments

PM Kamat, BW Wagoner, AA Castrejón-Pita… - Journal of Fluid …, 2020 - cambridge.org
Highly stretched liquid drops, or filaments, surrounded by a gas are routinely encountered in
nature and industry. Such filaments can exhibit complex and unexpected dynamics as they …

Experimental and numerical investigations on interface coupling of coaxial liquid jets in co-flow focusing

K Mu, H Ding, T Si - Physics of Fluids, 2020 - pubs.aip.org
The rupture of coaxial liquid jets in co-flow focusing is studied experimentally and
numerically, aiming to deepen the understanding of interface coupling and its effect on the …

Influence of the surface viscous stress on the pinch-off of free surfaces loaded with nearly-inviscid surfactants

A Ponce-Torres, M Rubio, MA Herrada, J Eggers… - Scientific reports, 2020 - nature.com
We analyze the breakup of a pendant water droplet loaded with SDS. The free surface
minimum radius measured in the experiments is compared with that obtained from a …

Slot coating flows with a Boussinesq–Scriven viscous interface

FO Silva, IR Siqueira, MS Carvalho, RL Thompson - Physics of Fluids, 2023 - pubs.aip.org
We present a computational study of free surface flows with rheologically complex interfaces
in the film formation region of a slot coater. The equations of motion for incompressible …