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Mostrando ítems 1-10 de 17
Artículo
Droplet group production in an AC electro- flow focusing microdevice
(Springer, 2017-09)
We report the production of droplet groups with a controlled number of drops in a microfluidic electro-flow focusing device under the action of an AC electric field. This regime appears for moderate voltages (500-700 V ...
Artículo
On the jets produced by drops impacting a deep liquid pool and by bursting bubbles
(Cambridge University Press, 2021)
Here we provide a unified theoretical description of two different physical situations in which liquid jets are expelled out of the bulk of a liquid as a consequence of the capillary collapse of a void. We demonstrate ...
Artículo
The initial impact of drops cushioned by an air or vapour layer with applications to the dynamic Leidenfrost regime
(Cambridge University Press, 2022-06-25)
This work is devoted to the study of the conditions under which a drop directed normally towards a superheated or isothermal smooth substrate prevents the initial contact with the solid by skating over a micrometre-sized ...
Artículo
Dripping, jetting and tip streaming
(Institute of Physics Publishing, 2020)
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 while the latter on applications. ...
Artículo
Spreading and splashing of drops impacting rough substrates
(Publisher Cambridge University Press, 2021)
Here, we present experimental results of water and ethanol drops of radii R, density ρ and interfacial tension coefficient σ, impacting with a velocity V over different types of sandpapers containing particles of ...
Artículo
The skating of drops impacting over gas or vapour layers
(Cambridge University Press, 2024-06)
We report numerical simulations confirming the predictions in Gordillo & Riboux (J. Fluid Mech., vol. 941, 2022, A10), where we elucidated the lubrication mechanism by which a drop of a low-viscosity liquid impacting over ...
Artículo
Self-similar electrohydrodynamic solutions in multiple coaxial Taylor cones
(2021)
We calculate analytically the self-similar Stokes flow driven by an externally applied electric field in a multiple coaxial Taylor cone consisting of an arbitrary number of immiscible leaky-dielectric or dielectric fluids. ...
Artículo
On the hydrodynamic focusing for producing microemulsions via tip streaming
(Cambridge University Press, 2022-03)
In this work we study experimentally and numerically the stability of hydrodynamic focusing to produce microemulsions. The jetting regime was produced experimentally for the lowest outer viscosity, while microdripping was ...
Artículo
Stability and tip streaming of a surfactant-loaded drop in an extensional flow. Influence of surface viscosity
(Cambridge University Press, 2022-03)
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 instability mechanism and the ...
Artículo
Impulsive generation of jets by flow focusing
(Cambridge University Press, 2020)
Here we characterize the origin and subsequent disintegration into droplets of the type of high-speed jets formed after the sudden implosion of a locally spherical cavity. The full spatio-temporal evolution of these types ...