Electrified droplet fission and the Rayleigh limit

Langmuir ◽  
1989 ◽  
Vol 5 (2) ◽  
pp. 376-384 ◽  
Author(s):  
Daniel C. Taflin ◽  
Timothy L. Ward ◽  
E. James Davis
Keyword(s):  
Rayleigh Limit ◽  
Droplet Fission

scholarly journals Beating the Rayleigh Limit Using Two-Photon Interference

2018 ◽  
Vol 121 (25) ◽  
Author(s):  
Michał Parniak ◽  
Sebastian Borówka ◽  
Kajetan Boroszko ◽  
Wojciech Wasilewski ◽  
Konrad Banaszek ◽  
...  
Keyword(s):  
Two Photon ◽  
Rayleigh Limit

Comprehensive model for fine Coulomb fission of liquid droplets charged to Rayleigh limit

2007 ◽  
Vol 91 (6) ◽  
pp. 064104 ◽  
Author(s):  
Wenhua Gu ◽  
Philip Edward Heil ◽  
Hyungsoo Choi ◽  
Kyekyoon Kim
Keyword(s):  
Comprehensive Model ◽  
Liquid Droplets ◽  
Coulomb Fission ◽  
Rayleigh Limit

scholarly journals Water Droplets Translocation and Fission in a 3D Bi-Planar Multifurcated T-Junction Microchannels

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 510
Author(s):  
Inn-Leon Lu ◽  
Voon-Loong Wong ◽  
Jit-Kai Chin ◽  
Kuzilati Kushaari
Keyword(s):  
Droplet Size ◽  
Flow Behavior ◽  
Phase 1 ◽  
Maximum Velocity ◽  
Droplet Size Distribution ◽  
Continuous Phase ◽  
Fission Process ◽  
Model Studies ◽  
Daughter Droplets ◽  
Droplet Fission

Droplet fission has gained notable interest in drug delivery applications due to its ability to perform parallel operations in single device. Hitherto, droplet flow behavior in a 3D constriction was scarcely investigated. This study aims to investigate droplets fission inside a 3D bi-planar multifurcated microfluidic device. The flow behavior and droplet size distribution were studied in trifurcated microchannels using distilled water as dispersed phase (1 mPa·s) and olive oil (68 mPa·s) as continuous phase. Various sizes of subordinate daughter droplets were manipulated passively through the modulation of flowrate ratio (Q) (0.15 < Q < 3.33). Overall, we found droplet size coefficient of variations (CV%) ranging from 0.72% to 69%. Highly monodispersed droplets were formed at the upstream T-junction (CV% < 2%) while the droplet fission process was unstable at higher flowrate ratio (Q > 0.4) as they travel downstream (1.5% < CV% < 69%) to splitting junctions. Complex responses to the non-monotonic behavior of mean droplet size was found at the downstream boundaries, which arose from the deformations under nonuniform flow condition. CFD was used as a tool to study the preliminary maximum velocity (Umax) profile for the symmetrical (0.01334 m/s < Umax < 0.0153 m/s) and asymmetrical branched channels (0.0223 m/s< Umax < 0.00438 m/s), thus complementing the experimental model studies.

Droplet Formation and Fission in Shear-Thinning/Newtonian Multiphase System Using Bilayer Bifurcating Microchannel

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Yong Ren ◽  
Kai Seng Koh ◽  
Jit Kai Chin ◽  
Jing Wang ◽  
Conghua Wen ◽  
...  
Keyword(s):  
Shear Thinning ◽  
Droplet Formation ◽  
Newtonian Fluids ◽  
Model Systems ◽  
Multiphase System ◽  
Blood Capillaries ◽  
Two Systems ◽  
Flow Through ◽  
Newtonian System ◽  
Droplet Fission

With a novel platform of bilayer polydimethylsiloxane microchannel formed by bifurcating junction, we aim to investigate droplet formation and fission in a multiphase system with complex three-dimensional (3D) structure and understand the variations in mechanism associated with droplet formation and fission in the microstructure between shear-thinning/Newtonian system versus Newtonian/Newtonian system. The investigation concentrates on shear-thinning fluid because it is one of the most ubiquitous rheological properties of non-Newtonian fluids. Sodium carboxymethyl cellulose (CMC) solution and silicone oil have been used as model fluids and numerical model has been established to characterize the shear-thinning effect in formation of CMC-in-oil emulsions, as well as breakup dynamics when droplets flow through 3D bifurcating junction. The droplet volume and generation rate have been compared between two systems at the same Weber number and capillary number. Variation in droplet fission has been found between two systems, demonstrating that the shear-thinning property and confining geometric boundaries significantly affect the deformation and breakup of each mother droplet into two daughter droplets at bifurcating junction. The understanding of the droplet fission in the novel microstructure will enable more versatile control over the emulsion formation and fission when non-Newtonian fluids are involved. The model systems in the study can be further developed to investigate the mechanical property of emulsion templated particles such as drug encapsulated microcapsules when they flow through complex media structures, such as blood capillaries or the porous tissue structure, which feature with bifurcating junction.

Decomposition of the time‐reversal operator in the Rayleigh limit

2007 ◽  
Vol 121 (5) ◽  
pp. 3047-3047
Author(s):  
Jean‐Gabriel Minonzio ◽  
Claire Prada ◽  
Mathias Fink
Keyword(s):  
Time Reversal ◽  
Rayleigh Limit

When droplets become stars: charged dielectric droplets beyond the Rayleigh limit

Soft Matter ◽  
2017 ◽  
Vol 13 (46) ◽  
pp. 8781-8795 ◽  
Author(s):  
Myong In Oh ◽  
Anatoly Malevanets ◽  
Maxim Paliy ◽  
Daan Frenkel ◽  
Styliani Consta
Keyword(s):  
Molecular Dynamics ◽  
Continuum Modelling ◽  
Rayleigh Limit

When a nano-drop comprising a single spherical central ion and dielectric solvent is charged above a well-defined threshold, it acquires a stable star morphology. These shapes are found by atomistic molecular dynamics and are compared with continuum modelling.

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