1
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Sheng L, Chen Y, Deng J, Luo G. Ideality analysis and general laws of bubble swarm microflow for large-scale gas-liquid microreaction processes. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.04.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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2
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He C, Jiang S, Zhu C, Ma Y, Fu T. Self-assembly of droplet swarms and its feedback on droplet generation in a step-emulsification microdevice with parallel microchannels. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Bogdan M, Montessori A, Tiribocchi A, Bonaccorso F, Lauricella M, Jurkiewicz L, Succi S, Guzowski J. Stochastic Jetting and Dripping in Confined Soft Granular Flows. PHYSICAL REVIEW LETTERS 2022; 128:128001. [PMID: 35394304 DOI: 10.1103/physrevlett.128.128001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 12/24/2021] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
We report new dynamical modes in confined soft granular flows, such as stochastic jetting and dripping, with no counterpart in continuum viscous fluids. The new modes emerge as a result of the propagation of the chaotic behavior of individual grains-here, monodisperse emulsion droplets-to the level of the entire system as the emulsion is focused into a narrow orifice by an external viscous flow. We observe avalanching dynamics and the formation of remarkably stable jets-single-file granular chains-which occasionally break, resulting in a non-Gaussian distribution of cluster sizes. We find that the sequences of droplet rearrangements that lead to the formation of such chains resemble unfolding of cancer cell clusters in narrow capillaries, overall demonstrating that microfluidic emulsion systems could serve to model various aspects of soft granular flows, including also tissue dynamics at the mesoscale.
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Affiliation(s)
- Michał Bogdan
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Andrea Montessori
- Dipartimento di Ingegneria, Universit degli Studi Roma tre, via Vito Volterra 62, Rome 00146, Italy
| | - Adriano Tiribocchi
- Istituto per le Applicazioni del Calcolo del Consiglio Nazionale delle Ricerche, via dei Taurini 19, 00185 Rome, Italy
| | - Fabio Bonaccorso
- Istituto per le Applicazioni del Calcolo del Consiglio Nazionale delle Ricerche, via dei Taurini 19, 00185 Rome, Italy
- Department of Physics and National Institute for Nuclear Physics, University of Rome "Tor Vergata", Via Cracovia, 50, 00133 Rome, Italy
| | - Marco Lauricella
- Istituto per le Applicazioni del Calcolo del Consiglio Nazionale delle Ricerche, via dei Taurini 19, 00185 Rome, Italy
| | - Leon Jurkiewicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Sauro Succi
- Istituto per le Applicazioni del Calcolo del Consiglio Nazionale delle Ricerche, via dei Taurini 19, 00185 Rome, Italy
- Center for Life Nanoscience at la Sapienza, Istituto Italiano di Tecnologia, viale Regina Elena 295, 00161 Rome, Italy
- Department of Physics, Harvard University, 17 Oxford Street, Cambridge, Massachusetts 02138, USA
| | - Jan Guzowski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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4
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Guzowski J, Buda RJ, Costantini M, Ćwiklińska M, Garstecki P, Stone HA. From dynamic self-organization to avalanching instabilities in soft-granular threads. SOFT MATTER 2022; 18:1801-1818. [PMID: 35166293 PMCID: PMC8889560 DOI: 10.1039/d1sm01350e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
We study the dynamics of threads of monodisperse droplets, including droplet chains and multi-chains, in which the droplets are interconnected by capillary bridges of another immiscible liquid phase. This system represents wet soft-granular matter - a class of granular materials in which the grains are soft and wetted by thin fluid films-with other examples including wet granular hydrogels or foams. In contrast to wet granular matter with rigid grains (e.g., wet sand), studied previously, the deformability of the grains raises the number of available metastable states and facilitates rearrangements which allow for reorganization and self-assembly of the system under external drive, e.g., applied via viscous forces. We use a co-flow configuration to generate a variety of unique low-dimensional regular granular patterns, intermediate between 1D and 2D, ranging from linear chains and chains with periodically occurring folds to multi-chains and segmented structures including chains of finite length. In particular, we observe that the partially folded chains self-organize via limit cycle of displacements and rearrangements occurring at a frequency self-adapted to the rate of build-up of compressive strain in the chain induced by the viscous forces. Upon weakening of the capillary arrest of the droplets, we observe spontaneous fluidization of the quasi-solid structures and avalanches of rearrangements. We identify two types of fluidization-induced instabilities and rationalize them in terms of a competition between advection and propagation. While we use aqueous droplets as the grains we demonstrate that the reported mechanisms of adaptive self-assembly apply to other types of soft granular systems including foams and microgels. We discuss possible application of the reported quasi-1D compartmentalized structures in tissue engineering, bioprinting and materials science.
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Affiliation(s)
- J Guzowski
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - R J Buda
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - M Costantini
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - M Ćwiklińska
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - P Garstecki
- Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - H A Stone
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, 08544 NJ, USA
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5
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Abstract
This review focuses on experimental work on nonlinear phenomena in microfluidics, which for the most part are phenomena for which the velocity of a fluid flowing through a microfluidic channel does not scale proportionately with the pressure drop. Examples include oscillations, flow-switching behaviors, and bifurcations. These phenomena are qualitatively distinct from laminar, diffusion-limited flows that are often associated with microfluidics. We explore the nonlinear behaviors of bubbles or droplets when they travel alone or in trains through a microfluidic network or when they assemble into either one- or two-dimensional crystals. We consider the nonlinearities that can be induced by the geometry of channels, such as their curvature or the bas-relief patterning of their base. By casting posts, barriers, or membranes─situated inside channels─from stimuli-responsive or flexible materials, the shape, size, or configuration of these elements can be altered by flowing fluids, which may enable autonomous flow control. We also highlight some of the nonlinearities that arise from operating devices at intermediate Reynolds numbers or from using non-Newtonian fluids or liquid metals. We include a brief discussion of relevant practical applications, including flow gating, mixing, and particle separations.
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Affiliation(s)
- Sarah Battat
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - David A Weitz
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.,Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - George M Whitesides
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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6
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Karnakov P, Litvinov S, Koumoutsakos P. Computing foaming flows across scales: From breaking waves to microfluidics. SCIENCE ADVANCES 2022; 8:eabm0590. [PMID: 35108038 PMCID: PMC8809540 DOI: 10.1126/sciadv.abm0590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
Crashing ocean waves, cappuccino froths, and microfluidic bubble crystals are examples of foamy flows. Foamy flows are critical in numerous natural and industrial processes and remain notoriously difficult to compute as they involve coupled, multiscale physical processes. Computations need to resolve the interactions of the bubbles separated by stable thin liquid films. We present the multilayer volume-of-fluid method (Multi-VOF) that advances the state of the art in simulation capabilities of foamy flows. The method introduces a scheme to handle multiple bubbles that do not coalesce. Multi-VOF is verified and validated with experimental results and complemented with open-source software. We demonstrate capturing of crystalline structures of bubbles in realistic microfluidics devices and foamy flows involving tens of thousands of bubbles in a waterfall. The present technique extends the classical volume-of-fluid methodology and allows for large-scale predictive simulations of flows with multiple interfaces.
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Affiliation(s)
- Petr Karnakov
- Computational Science and Engineering Laboratory, ETH Zurich, Clausiusstrasse 33, Zurich CH-8092, Switzerland
- Computational Science and Engineering Laboratory, School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA
| | - Sergey Litvinov
- Computational Science and Engineering Laboratory, ETH Zurich, Clausiusstrasse 33, Zurich CH-8092, Switzerland
| | - Petros Koumoutsakos
- Computational Science and Engineering Laboratory, ETH Zurich, Clausiusstrasse 33, Zurich CH-8092, Switzerland
- Computational Science and Engineering Laboratory, School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA
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7
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Tiribocchi A, Montessori A, Durve M, Bonaccorso F, Lauricella M, Succi S. Dynamics of polydisperse multiple emulsions in microfluidic channels. Phys Rev E 2021; 104:065112. [PMID: 35030928 DOI: 10.1103/physreve.104.065112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Multiple emulsions are a class of soft fluid in which small drops are immersed within a larger one and stabilized over long periods of time by a surfactant. We recently showed that, if a monodisperse multiple emulsion is subject to a pressure-driven flow, a wide variety of nonequilibrium steady states emerges at late times, whose dynamics relies on a complex interplay between hydrodynamic interactions and multibody collisions among internal drops. In this work, we use lattice Boltzmann simulations to study the dynamics of polydisperse double emulsions driven by a Poiseuille flow within a microfluidic channel. Our results show that their behavior is critically affected by multiple factors, such as initial position, polydispersity index, and area fraction occupied within the emulsion. While at low area fraction inner drops may exhibit either a periodic rotational motion (at low polydispersity) or arrange into nonmotile configurations (at high polydispersity) located far from each other, at larger values of area fraction they remain in tight contact and move unidirectionally. This decisively conditions their close-range dynamics, quantitatively assessed through a time-efficiency-like factor. Simulations also unveil the key role played by the capsule, whose shape changes can favor the formation of a selected number of nonequilibrium states in which both motile and nonmotile configurations are found.
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Affiliation(s)
- A Tiribocchi
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185 Rome, Italy
| | - A Montessori
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185 Rome, Italy
| | - M Durve
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Roma, Italy
| | - F Bonaccorso
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185 Rome, Italy
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Roma, Italy
- Department of Physics and INFN, University of Rome "Tor Vergata," Via della Ricerca Scientifica, 00133 Rome, Italy
| | - M Lauricella
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185 Rome, Italy
| | - S Succi
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185 Rome, Italy
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Roma, Italy
- Institute for Applied Computational Science, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
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8
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Montessori A, Tiribocchi A, Bogdan M, Bonaccorso F, Lauricella M, Guzowski J, Succi S. Translocation Dynamics of High-Internal Phase Double Emulsions in Narrow Channels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9026-9033. [PMID: 34291636 PMCID: PMC8503876 DOI: 10.1021/acs.langmuir.1c01026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/18/2021] [Indexed: 06/13/2023]
Abstract
We numerically study the translocation dynamics of double emulsion drops with multiple close-packed inner droplets within constrictions. Such liquid architectures, which we refer to as HIPdEs (high-internal phase double emulsions), consist of a ternary fluid, in which monodisperse droplets are encapsulated within a larger drop in turn immersed in a bulk fluid. Extensive two-dimensional lattice Boltzmann simulations show that if the area fraction of the internal drops is close to the packing fraction limit of hard spheres and the height of the channel is much smaller than the typical size of the emulsion, the crossing yields permanent shape deformations persistent over long periods of time. Morphological changes and rheological response are quantitatively assessed in terms of the structure of the velocity field, circularity of the emulsion, and rate of energy dissipated by viscous forces. Our results may be used to improve the design of soft mesoscale porous materials, which employ HIPdEs as templates for tissue engineering applications.
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Affiliation(s)
- Andrea Montessori
- Istituto
per le Applicazioni del Calcolo CNR, Via dei Taurini 19, Rome 00185, Italy
| | - Adriano Tiribocchi
- Istituto
per le Applicazioni del Calcolo CNR, Via dei Taurini 19, Rome 00185, Italy
- Center
for Life Nanoscience at la Sapienza, Istituto
Italiano di Tecnologia, Viale Regina Elena 295, Rome 00161, Italy
| | - Michał Bogdan
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Fabio Bonaccorso
- Istituto
per le Applicazioni del Calcolo CNR, Via dei Taurini 19, Rome 00185, Italy
- Center
for Life Nanoscience at la Sapienza, Istituto
Italiano di Tecnologia, Viale Regina Elena 295, Rome 00161, Italy
- Dipartimento
di Fisica, Università degli Studi
di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, Rome 00133, Italy
| | - Marco Lauricella
- Istituto
per le Applicazioni del Calcolo CNR, Via dei Taurini 19, Rome 00185, Italy
| | - Jan Guzowski
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Sauro Succi
- Istituto
per le Applicazioni del Calcolo CNR, Via dei Taurini 19, Rome 00185, Italy
- Center
for Life Nanoscience at la Sapienza, Istituto
Italiano di Tecnologia, Viale Regina Elena 295, Rome 00161, Italy
- Institute
for Applied Computational Science, Harvard
John A. Paulson School of Engineering and Applied Sciences, Cambridge, Massachusetts 02138, United States
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9
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Del Giudice F, D'Avino G, Maffettone PL. Microfluidic formation of crystal-like structures. LAB ON A CHIP 2021; 21:2069-2094. [PMID: 34002182 DOI: 10.1039/d1lc00144b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Crystal-like structures find application in several fields ranging from biomedical engineering to material science. For instance, droplet crystals are critical for high throughput assays and material synthesis, while particle crystals are important for particles and cell encapsulation, Drop-seq technologies, and single-cell analysis. Formation of crystal-like structures relies entirely on the possibility of manipulating with great accuracy the micrometer-size objects forming the crystal. In this context, microfluidic devices offer versatile tools for the precise manipulation of droplets and particles, thus enabling fabrication of crystal-like structures that form due to hydrodynamic interactions among droplets or particles. In this review, we aim at providing an holistic representation of crystal-like structure formation mediated by hydrodynamic interactions in microfluidic devices. We also discuss the physical origin of these hydrodynamic interactions and their relation to parameters such as device geometry, fluid properties, and flow conditions.
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Affiliation(s)
- Francesco Del Giudice
- System and Process Engineering Centre, College of Engineering, Fabian Way, Swansea, SA1 8EN, UK.
| | - Gaetano D'Avino
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Universitá degli Studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Pier Luca Maffettone
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Universitá degli Studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
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10
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Montessori A, Tiribocchi A, Lauricella M, Bonaccorso F, Succi S. Mesoscale modelling of droplets' self-assembly in microfluidic channels. SOFT MATTER 2021; 17:2374-2383. [PMID: 33592086 DOI: 10.1039/d0sm02047h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A recently proposed mesoscale approach for the simulation of multicomponent flows with near-contact interactions is employed to investigate the early stage formation and clustering statistics of soft flowing crystals in microfluidic channels. Specifically, we first demonstrate the ability of the aforementioned mesoscale model to accurately reproduce main mechanisms leading to the formation of two basic droplet patterns (triangular and hexagonal), in close agreement with experimental evidence. Next, we quantitatively evaluate the device-scale clustering efficiency of the crystal formation process by introducing a new orientational order parameter, based on the Delaunay triangulation and Voronoi diagrams analysis of the droplet patterns. The mesoscale computational approach employed in this work proves to be an efficient tool to shed new light on the complex dynamics of dense emulsions, from short-scale thin-film hydrodynamics, all the way up to global structure formation and statistics of the resulting droplets ensembles.
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Affiliation(s)
- Andrea Montessori
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185, Rome, Italy.
| | - Adriano Tiribocchi
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185, Rome, Italy. and Center for Life Nanoscience at la Sapienza, Istituto Italiano di Tecnologia, viale Regina Elena 295, 00161, Rome, Italy
| | - Marco Lauricella
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185, Rome, Italy.
| | - Fabio Bonaccorso
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185, Rome, Italy. and Center for Life Nanoscience at la Sapienza, Istituto Italiano di Tecnologia, viale Regina Elena 295, 00161, Rome, Italy and Dept. Physics and INFN, University of Rome "Tor Vergata", Italy
| | - Sauro Succi
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, 00185, Rome, Italy. and Center for Life Nanoscience at la Sapienza, Istituto Italiano di Tecnologia, viale Regina Elena 295, 00161, Rome, Italy and Institute for Applied Computational Science, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, USA
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11
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Wang H, Shen Q, Zhu C, Ma Y, Fu T. Formation and uniformity of bubbles in highly viscous fluids in symmetric parallel microchannels. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116166] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Zhang Z, Wang Z, Bao F, Fan M, Jiang S, Zhu C, Ma Y, Fu T. Bubble formation in a step-emulsification microdevice: hydrodynamic effects in the cavity. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.12.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Tiribocchi A, Montessori A, Lauricella M, Bonaccorso F, Succi S, Aime S, Milani M, Weitz DA. The vortex-driven dynamics of droplets within droplets. Nat Commun 2021; 12:82. [PMID: 33398018 PMCID: PMC7782531 DOI: 10.1038/s41467-020-20364-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 11/20/2020] [Indexed: 01/29/2023] Open
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.
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Affiliation(s)
- A. Tiribocchi
- grid.25786.3e0000 0004 1764 2907Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, Roma, 00161 Italy ,grid.5326.20000 0001 1940 4177Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, 00185 Italy
| | - A. Montessori
- grid.5326.20000 0001 1940 4177Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, 00185 Italy
| | - M. Lauricella
- grid.5326.20000 0001 1940 4177Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, 00185 Italy
| | - F. Bonaccorso
- grid.25786.3e0000 0004 1764 2907Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, Roma, 00161 Italy ,grid.5326.20000 0001 1940 4177Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, 00185 Italy
| | - S. Succi
- grid.25786.3e0000 0004 1764 2907Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, Roma, 00161 Italy ,grid.5326.20000 0001 1940 4177Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, 00185 Italy ,grid.38142.3c000000041936754XInstitute for Applied Computational Science, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| | - S. Aime
- grid.38142.3c000000041936754XInstitute for Applied Computational Science, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA ,grid.15736.360000 0001 1882 0021Matiére Molle et Chimie, Ecole Supérieure de Physique et Chimie Industrielles, Paris, 75005 France
| | - M. Milani
- grid.4708.b0000 0004 1757 2822Universitá degli Studi di Milano, via Celoria 16, Milano, 20133 Italy
| | - D. A. Weitz
- grid.38142.3c000000041936754XInstitute for Applied Computational Science, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA ,grid.38142.3c000000041936754XDepartment of Physics, Harvard University, Cambridge, MA 02138 USA
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14
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Liu Z, Duan C, Jiang S, Zhu C, Ma Y, Fu T. Microfluidic step emulsification techniques based on spontaneous transformation mechanism: A review. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.08.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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15
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Zhang Z, Jiang S, Zhu C, Ma Y, Fu T. Bubble formation in a step-emulsification microdevice with parallel microchannels. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115815] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Montessori A, Tiribocchi A, Bonaccorso F, Lauricella M, Succi S. Lattice Boltzmann simulations capture the multiscale physics of soft flowing crystals. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2020; 378:20190406. [PMID: 32564719 PMCID: PMC7333952 DOI: 10.1098/rsta.2019.0406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/26/2020] [Indexed: 06/11/2023]
Abstract
The study of the underlying physics of soft flowing materials depends heavily on numerical simulations, due to the complex structure of the governing equations reflecting the competition of concurrent mechanisms acting at widely disparate scales in space and time. A full-scale computational modelling remains a formidable challenge since it amounts to simultaneously handling six or more spatial decades in space and twice as many in time. Coarse-grained methods often provide a viable strategy to significantly mitigate this issue, through the implementation of mesoscale supramolecular forces designed to capture the essential physics at a fraction of the computational cost of a full-detail description. Here, we review some recent advances in the design of a lattice Boltzmann mesoscale approach for soft flowing materials, inclusive of near-contact interactions (NCIs) between dynamic interfaces, as they occur in high packing-fraction soft flowing crystals. The method proves capable of capturing several aspects of the rheology of soft flowing crystals, namely, (i) a 3/2 power-law dependence of the dispersed phase flow rate on the applied pressure gradient, (ii) the structural transition between an ex-two and ex-one (bamboo) configurations with the associated drop of the flow rate, (iii) the onset of interfacial waves once NCI is sufficiently intense. This article is part of the theme issue 'Fluid dynamics, soft matter and complex systems: recent results and new methods'.
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Affiliation(s)
- A. Montessori
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
| | - A. Tiribocchi
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Rome, Italy
| | - F. Bonaccorso
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Rome, Italy
| | - M. Lauricella
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
| | - S. Succi
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Rome, Italy
- Institute for Applied Computational Science, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
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17
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Tiribocchi A, Montessori A, Miliani S, Lauricella M, La Rocca M, Succi S. Microvorticity fluctuations affect the structure of thin fluid films. Phys Rev E 2019; 100:042606. [PMID: 31770937 DOI: 10.1103/physreve.100.042606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Indexed: 11/07/2022]
Abstract
The dynamic interaction of complex fluid interfaces is highly sensitive to near-contact interactions occurring at the scale of ten of nanometers. Such interactions are difficult to analyze because they couple self-consistently to the dynamic morphology of the evolving interface, as well as to the hydrodynamics of the interstitial fluid film. In this work, we show that, above a given magnitude threshold, near-contact interactions trigger nontrivial microvorticity patterns, which in turn affect the effective near-contact interactions, giving rise to persistent fluctuating ripples at the fluid interface. In such a regime, near-contact interactions may significantly affect the macroscopic arrangement of emulsion configurations, such as those arising in soft-flowing microfluidic crystals.
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Affiliation(s)
- A Tiribocchi
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Roma, Italy.,Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
| | - A Montessori
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
| | - S Miliani
- Department of Engineering, Roma Tre University, Via Vito Volterra 62, Rome 00146, Italy
| | - M Lauricella
- Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy
| | - M La Rocca
- Department of Engineering, Roma Tre University, Via Vito Volterra 62, Rome 00146, Italy
| | - S Succi
- Center for Life Nano Science@La Sapienza, Istituto Italiano di Tecnologia, 00161 Roma, Italy.,Istituto per le Applicazioni del Calcolo CNR, via dei Taurini 19, Rome, Italy.,Institute for Applied Computational Science, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 01451, USA
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18
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Parthiban P, Doyle PS, Hashimoto M. Self-assembly of droplets in three-dimensional microchannels. SOFT MATTER 2019; 15:4244-4254. [PMID: 31016319 DOI: 10.1039/c8sm02305k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Self-assembly of droplets guided by microfluidic channels have potential applications ranging from high throughput assays to materials synthesis, but such demonstrations have been limited primarily to two-dimensional (2D) assembly of droplets in planar microfluidic devices. We demonstrated the use of three-dimensional (3D) microchannels to self-assemble droplets into ordered 2D and 3D arrays by designing microchannels with axial gradients in height and controlling the volume fraction of the droplets in the channel. In contrast to previous demonstrations, ordered 2D arrays of droplets were assembled at low volume fractions of the dispersed phase. Interestingly, we found that the self-assembly of droplets in microchannels was highly path dependent. The assembly of droplets was governed by transitions in the cross-sectional shapes of the microchannel, not the final geometry of the chamber for the assembly of droplet, which is a hitherto rarely explored phenomenon. The assembled droplets were used as templates for the fabrication of millimeter scale, anisotropic hydrogel fibers with ordered pore sizes (∼250 μm). These demonstrations suggested that 3D microchannels would be a viable platform for the manipulation of droplets, and applicable for the continuous synthesis of complex materials with 3D morphologies.
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Affiliation(s)
- Pravien Parthiban
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372, Singapore.
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19
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Tsang ACH, Shelley MJ, Kanso E. Activity-induced instability of phonons in 1D microfluidic crystals. SOFT MATTER 2018; 14:945-950. [PMID: 29319100 DOI: 10.1039/c7sm01335c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
One-dimensional crystals of passively-driven particles in microfluidic channels exhibit collective vibrational modes reminiscent of acoustic 'phonons'. These phonons are induced by the long-range hydrodynamic interactions among the particles and are neutrally stable at the linear level. Here, we analyze the effect of particle activity - self-propulsion - on the emergence and stability of these phonons. We show that the direction of wave propagation in active crystals is sensitive to the intensity of the background flow. We also show that activity couples, at the linear level, transverse waves to the particles' rotational motion, inducing a new mode of instability that persists in the limit of large background flow, or, equivalently, vanishingly small activity. We then report a new phenomenon of phonons switching back and forth between two adjacent crystals in both passively-driven and active systems, similar in nature to the wave switching observed in quantum mechanics, optical communication, and density stratified fluids. These findings could have implications for the design of commercial microfluidic systems and the self-assembly of passive and active micro-particles into one-dimensional structures.
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Affiliation(s)
- Alan Cheng Hou Tsang
- Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, California 90089, USA. and Bioengineering, Stanford University, Stanford, California 94305, USA
| | - Michael J Shelley
- Center for Computational Biology, Flatiron Institute, New York, New York 10010, USA and Courant Institute of Mathematical Sciences, New York University, New York, New York 10012, USA
| | - Eva Kanso
- Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, California 90089, USA. and Center for Computational Biology, Flatiron Institute, New York, New York 10010, USA and Courant Institute of Mathematical Sciences, New York University, New York, New York 10012, USA
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20
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Elsayed M, Kothandaraman A, Edirisinghe M, Huang J. Porous Polymeric Films from Microbubbles Generated Using a T-Junction Microfluidic Device. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13377-13385. [PMID: 27993032 DOI: 10.1021/acs.langmuir.6b02890] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, a simple microfluidic junction with a T geometry and coarse (200 μm diameter) capillaries was used to generate monodisperse microbubbles with an alginate polymer shell. Subsequently, these bubbles were used to prepare porous alginate films with good control over the pore structure. The lack of pore size, shape, and surface control in scalable forming of polymeric films is a major application-limiting drawback at present. Controlling the thinning process of the shell of the bubbles to tune the surface of the resulting structures was also explored. Films were prepared with nanopatterned surfaces by controlling the thinning of the bubble shell, with the aid of surfactants, to induce efficient bursting (fragmentation) of bubbles to generate nanodroplets, which become embedded within the film surface. This novel feature greatly expands and enhances the use of hydrophilic polymers in a wide range of biomedical applications, particularly in drug delivery and tissue engineering, such as studying cellular responses to different morphological surfaces.
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Affiliation(s)
- M Elsayed
- Department of Mechanical Engineering, University College London , Torrington Place, London WC1E 7JE, United Kingdom
| | - A Kothandaraman
- Department of Mechanical Engineering, University College London , Torrington Place, London WC1E 7JE, United Kingdom
| | - M Edirisinghe
- Department of Mechanical Engineering, University College London , Torrington Place, London WC1E 7JE, United Kingdom
| | - J Huang
- Department of Mechanical Engineering, University College London , Torrington Place, London WC1E 7JE, United Kingdom
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21
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Shi S, Wang Y, Bai S, Li Z, Ding M, Chen W. Pore-Scale Studies on the Stability of Microfoam and the Effect of Parameters on Its Bubble Size. J DISPER SCI TECHNOL 2016. [DOI: 10.1080/01932691.2015.1058168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Drenckhan W, Saint-Jalmes A. The science of foaming. Adv Colloid Interface Sci 2015; 222:228-59. [PMID: 26056064 DOI: 10.1016/j.cis.2015.04.001] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/08/2015] [Accepted: 04/08/2015] [Indexed: 02/02/2023]
Abstract
The generation of liquid foams is at the heart of numerous natural, technical or scientific processes. Even though the subject of foam generation has a long-standing history, many recent progresses have been made in an attempt to elucidate the fundamental processes at play. We review the subject by providing an overview of the relevant key mechanisms of bubble generation within a coherent hydrodynamic context; and we discuss different foaming techniques which exploit these mechanisms.
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23
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Huerre A, Miralles V, Jullien MC. Bubbles and foams in microfluidics. SOFT MATTER 2014; 10:6888-902. [PMID: 24913678 DOI: 10.1039/c4sm00595c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Microfluidics offers great tools to produce highly-controlled dispersions of gas into liquid, from isolated bubbles to organized microfoams. Potential technological applications are manifold, from novel materials to scaffolds for tissue engineering or enhanced oil recovery. More fundamentally, microfluidics makes it possible to investigate the physics of complex systems such as foams at scales where the capillary forces become dominant, in model experiments involving few well-controlled parameters. In this context, this review does not have the ambition to detail in a comprehensive manner all the techniques and applications involving bubbles and foams in microfluidics. Rather, it focuses on particular consequences of working at the microscale, under confinement, and hopes to provide insight into the physics of such systems. The first part of this work focuses on bubbles, and more precisely on (i) bubble generation, where the confinement can suppress capillary instabilities while inertial effects may play a role, and (ii) bubble dynamics, paying special attention to the lubrication film between bubble and wall and the influence of confinement. The second part addresses the formation and dynamics of microfoams, emphasizing structural differences from macroscopic foams and the influence of the confinement.
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Affiliation(s)
- Axel Huerre
- MMN, UMR CNRS Gulliver 7083, PSL research University, ESPCI ParisTech, 10 rue Vauquelin, 75005 Paris, France.
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24
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Dollet B, Jones SA, Méheust Y, Cantat I. Influence of the elastic deformation of a foam on its mobility in channels of linearly varying width. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 90:023006. [PMID: 25215819 DOI: 10.1103/physreve.90.023006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Indexed: 06/03/2023]
Abstract
We study foam flow in an elementary model porous medium consisting of a convergent and a divergent channel positioned side by side and possessing a fixed joint porosity. Configurations of converging or diverging channels are ubiquitous at the pore scale in porous media, as all channels linking pores possess a converging and diverging part. The resulting flow kinematics imposes asymmetric bubble deformations in the two channels, which modulate foam-wall friction and strongly impact the flux distribution. We measure, as well as quantitatively predict, the ratio of the fluxes in the two channels as a function of the channel widths by modeling pressure drops of both viscous and capillary origins. This study reveals the crucial importance of boundary-induced bubble deformation on the mobility of a flowing foam, resulting in particular in flow irreversibility.
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Affiliation(s)
- Benjamin Dollet
- Institut de Physique de Rennes, Université Rennes 1, CNRS UMR No. 6251, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Siân A Jones
- Institut de Physique de Rennes, Université Rennes 1, CNRS UMR No. 6251, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Yves Méheust
- Géosciences, Université Rennes 1, CNRS UMR No. 6118, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Isabelle Cantat
- Institut de Physique de Rennes, Université Rennes 1, CNRS UMR No. 6251, Campus Beaulieu, 35042 Rennes Cedex, France
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25
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Claussen O, Herminghaus S, Brinkmann M. Packings of monodisperse emulsions in flat microfluidic channels. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:061403. [PMID: 23005092 DOI: 10.1103/physreve.85.061403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 02/18/2012] [Indexed: 06/01/2023]
Abstract
In the lateral confinement of a flat microfluidic channel, monodisperse emulsion droplets spontaneously self-organize in a variety of topologically different packings. The explicit construction of mechanically equilibrated arrangements of effectively two-dimensional congruent droplet shapes reveals the existence of multiple mechanical equilibria depending on channel width W, droplet area A{d}, and volume fraction φ of the dispersed phase. The corresponding boundaries of local or global stability are summarized in a packing diagram for congruent droplet shapes in terms of the dimensionless channel width w=W/sqrt[A_{d}] and φ. In agreement with experimental results, an increasingly strong hysteresis of the transition between single-row and two-row packings is observed during changes of w above a threshold volume fraction of φ≃0.813.
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Affiliation(s)
- Ohle Claussen
- Max-Planck Institute for Dynamics and Self-Organization, Bunsenstrasse 10, 37073 Göttingen, Germany
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26
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27
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Parikesit GOF, Vrouwe EX, Blom MT, Westerweel J. Observation of hydrophobic-like behavior in geometrically patterned hydrophilic microchannels. BIOMICROFLUIDICS 2010; 4:44103. [PMID: 21042432 PMCID: PMC2966485 DOI: 10.1063/1.3499416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Accepted: 09/18/2010] [Indexed: 05/07/2023]
Abstract
We present our observation of meta-hydrophobicity, where geometrically patterned surfaces make hydrophilic microchannels exhibit hydrophobic-like behaviors. We analyze the wetting-induced energy decrease that results from the surface geometries and experimentally demonstrate how those geometries can modulate the dynamics of capillary-driven wetting and evaporation-driven drying of microfluidic systems. Our results also show that the modulated wetting dynamics can be employed to generate regulated patterns of microbubbles.
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28
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29
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Garstecki P. Formation of Droplets and Bubbles in Microfluidic Systems. MICROFLUIDICS BASED MICROSYSTEMS 2010. [DOI: 10.1007/978-90-481-9029-4_9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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30
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Heinrich J, Kim SH, Merlino RL. Laboratory observations of self-excited dust acoustic shocks. PHYSICAL REVIEW LETTERS 2009; 103:115002. [PMID: 19792379 DOI: 10.1103/physrevlett.103.115002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Indexed: 05/28/2023]
Abstract
Repeated, self-excited dust acoustic shock waves (DASWs) have been observed in a dc glow discharge dusty plasma using high-speed video imaging. Two major observations are reported: (1) The self-steepening of a nonlinear dust acoustic wave (DAW) into a saw-tooth wave with sharp gradient in dust density, very similar to those found in numerical solutions of the fully nonlinear fluid equations for a nondispersive DAW [B. Eliasson and P. K. Shukla, Phys. Rev. E 69, 067401 (2004)], and (2) the collision and confluence of two DASWs.
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Affiliation(s)
- J Heinrich
- Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA
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31
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Green T, Grassia P, Lue L, Embley B. Viscous froth model for a bubble staircase structure under rapid applied shear: An analysis of fast flowing foam. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.06.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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