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The vortex-driven dynamics of droplets within droplets
- Source :
- Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021), Nature communications 12 (2021). doi:10.1038/s41467-020-20364-0, info:cnr-pdr/source/autori:Tiribocchi A.; Montessori A.; Lauricella M.; Bonaccorso F.; Succi S.; Aime S.; Milani M.; Weitz D.A./titolo:The vortex-driven dynamics of droplets within droplets/doi:10.1038%2Fs41467-020-20364-0/rivista:Nature communications/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume:12, Nature Communications
- Publication Year :
- 2020
- Publisher :
- arXiv, 2020.
-
Abstract
- Understanding the fluid-structure interaction is crucial for an optimal design and manufacturing of soft mesoscale materials. Multi-core emulsions are a class of soft fluids assembled from cluster configurations of deformable oil-water double droplets (cores), often employed as building-blocks for the realisation of devices of interest in bio-technology, such as drug-delivery, tissue engineering and regenerative medicine. Here, we study the physics of multi-core emulsions flowing in microfluidic channels and report numerical evidence of a surprisingly rich variety of driven non-equilibrium states (NES), whose formation is caused by a dipolar fluid vortex triggered by the sheared structure of the flow carrier within the microchannel. The observed dynamic regimes range from long-lived NES at low core-area fraction, characterised by a planetary-like motion of the internal drops, to short-lived ones at high core-area fraction, in which a pre-chaotic motion results from multi-body collisions of inner drops, as combined with self-consistent hydrodynamic interactions. The onset of pre-chaotic behavior is marked by transitions of the cores from one vortex to another, a process that we interpret as manifestations of the system to maximize its entropy by filling voids, as they arise dynamically within the capsule.<br />Comment: Post-peer-review version of an article published in Nature Communications. Movies upon request
- Subjects :
- Materials science
Science
Flow (psychology)
Mesoscale meteorology
General Physics and Astronomy
FOS: Physical sciences
computational fluid dynamics
02 engineering and technology
Condensed Matter - Soft Condensed Matter
01 natural sciences
Article
General Biochemistry, Genetics and Molecular Biology
Physics::Fluid Dynamics
Entropy (classical thermodynamics)
Fluid dynamics
0103 physical sciences
Cluster (physics)
010306 general physics
Fluids
Range (particle radiation)
Multidisciplinary
Microchannel
Soft materials
Dynamics (mechanics)
Fluid Dynamics (physics.flu-dyn)
Physics - Fluid Dynamics
General Chemistry
Mechanics
021001 nanoscience & nanotechnology
3. Good health
Vortex
Soft Condensed Matter (cond-mat.soft)
0210 nano-technology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021), Nature communications 12 (2021). doi:10.1038/s41467-020-20364-0, info:cnr-pdr/source/autori:Tiribocchi A.; Montessori A.; Lauricella M.; Bonaccorso F.; Succi S.; Aime S.; Milani M.; Weitz D.A./titolo:The vortex-driven dynamics of droplets within droplets/doi:10.1038%2Fs41467-020-20364-0/rivista:Nature communications/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume:12, Nature Communications
- Accession number :
- edsair.doi.dedup.....bfecbe2d0408429b9fcc749bfd55b944
- Full Text :
- https://doi.org/10.48550/arxiv.2004.12219