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Experimental study on dynamics of double emulsion droplets flowing through the Y-shaped bifurcation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2
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Yang H, Knowles TPJ. Hydrodynamics of Droplet Sorting in Asymmetric Acute Junctions. MICROMACHINES 2022; 13:1640. [PMID: 36295993 PMCID: PMC9611150 DOI: 10.3390/mi13101640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/16/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Droplet sorting is one of the fundamental manipulations of droplet-based microfluidics. Although many sorting methods have already been proposed, there is still a demand to develop new sorting methods for various applications of droplet-based microfluidics. This work presents numerical investigations on droplet sorting with asymmetric acute junctions. It is found that the asymmetric acute junctions could achieve volume-based sorting and velocity-based sorting. The pressure distributions in the asymmetric junctions are discussed to reveal the physical mechanism behind the droplet sorting. The dependence of the droplet sorting on the droplet volume, velocity, and junction angle is explored. The possibility of the employment of the proposed sorting method in most real experiments is also discussed. This work provides a new, simple, and cost-effective passive strategy to separate droplets in microfluidic channels. Moreover, the proposed acute junctions could be used in combination with other sorting methods, which may boost more opportunities to sort droplets.
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Affiliation(s)
- He Yang
- School of Mechanical Engineering, Hangzhou Dianzi University, No. 2 Street, Qiantang District, Hangzhou 310018, China
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Tuomas P. J. Knowles
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK
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Kumari P, Atta A. Droplet breakup in a parallel microchannel with asymmetrical geometric constraints. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.05.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Fonseca LR, Santos TP, Czaikoski A, Cunha RL. Microfluidics-based production of chitosan-gellan nanocomplexes encapsulating caffeine. Food Res Int 2022; 151:110885. [PMID: 34980412 DOI: 10.1016/j.foodres.2021.110885] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 11/16/2021] [Accepted: 12/07/2021] [Indexed: 11/04/2022]
Abstract
Electrostatic complexes produced by interactions between polysaccharides have promising applications in the medical, pharmaceutical and food fields. In this light, for the development of such particles, microfluidics emerges as a promising technique in which processes occur at a strict laminar flow regime, allowing diffusion-dominated transport and particle formation in highly-controlled conditions. As a proof of concept, we compared bulk versus microfluidic (different devices simulating a range of residence times) processes for the production of electrostatic complexes of gellan with either chitosan (molecular weight ∼ 28 kDa) or hydrolyzed chitosan (molecular weight ∼ 3 kDa). Regardless of the process, polysaccharide solutions (pH 4.5) were mixed in pre-defined concentrations (polysaccharide ratios) to form electrostatic complexes that were used to encapsulate caffeine. These complexes were characterized by zeta potential measurements and particle size distribution. Overall, microfluidics produced complexes with improved characteristics such as lower polydispersity index (PDI ∼ 0.1) and mean size (∼200 nm) when compared to the conventional bulk process (PDI ∼ 0.3 and mean size ∼ 400 nm). Moreover, hydrolyzed chitosan (HC) contributed to an even smaller size and PDI value of the complexes. Such outcome is associated with the lower molecular weight and higher solubility of HC when comparing to conventional chitosan, which in turn improves electrostatic complexation. Caffeine could also be encapsulated in all complexes, but the highest encapsulation efficiency was achieved using microfluidics (70%) and with the geometry that provided a longer residence time. Therefore, we were able to demonstrate that microfluidics is clearly an effective strategy for generating electrostatic complexes with improved properties. Ultimately, this technique demonstrated a high potential for the production of vehicles of bioactive compounds.
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Affiliation(s)
- Larissa Ribas Fonseca
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862 Campinas, SP, Brazil
| | - Tatiana Porto Santos
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862 Campinas, SP, Brazil
| | - Aline Czaikoski
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862 Campinas, SP, Brazil
| | - Rosiane Lopes Cunha
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862 Campinas, SP, Brazil.
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Bijarchi MA, Dizani M, Honarmand M, Shafii MB. Splitting dynamics of ferrofluid droplets inside a microfluidic T-junction using a pulse-width modulated magnetic field in micro-magnetofluidics. SOFT MATTER 2021; 17:1317-1329. [PMID: 33313630 DOI: 10.1039/d0sm01764g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Micro-magnetofluidics offers a promising tool for better control over the ferrofluid droplet manipulation which has been vastly utilized in biomedical applications in recent years. In this study, the ferrofluid droplet splitting under an asymmetric Pulse-Width-Modulated (PWM) magnetic field in a T-junction is numerically investigated using a finite volume method and VOF two-phase model. By utilizing the PWM magnetic field, two novel regimes of ferrofluid droplet splitting named as Flowing through the Same Branch (FSB) and Double Splitting (DS) have been observed for the first time. In the FSB regime, the daughter droplets move out of the same microchannel outlet, and in the DS regime, the droplet splitting occurs two times which results in generating three daughter droplets. The main problem related to the asymmetric droplet splitting under a steady magnetic field is daughter droplet trapping. By using a PWM magnetic field, this issue is resolved and the trapped/escaped regions are obtained in terms of the duty cycle and dimensionless magnetic field frequency. The effects of six important dimensionless parameters on the splitting ratio, including magnetic Bond number, duty cycle, dimensionless magnetic field frequency, capillary number, dimensionless mother droplet length, and dimensionless dipole position are investigated. The results showed that the splitting ratio increases with increasing magnetic Bond number or duty cycle, or decreasing the dimensionless magnetic field frequency. Eventually, a correlation is offered for the splitting ratio based on the dimensionless variables with an average relative error of 2.67%.
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Affiliation(s)
- Mohamad Ali Bijarchi
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
| | - Mahdi Dizani
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
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Wang X, Liu Z, Pang Y. Breakup dynamics of droplets in an asymmetric bifurcation by μPIV and theoretical investigations. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.12.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Li Z, Li L, Liao M, He L, Wu P. Multiple splitting of droplets using multi-furcating microfluidic channels. BIOMICROFLUIDICS 2019; 13:024112. [PMID: 31065311 PMCID: PMC6486392 DOI: 10.1063/1.5086716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 04/14/2019] [Indexed: 06/09/2023]
Abstract
Removing volumes from droplets is a challenging but critical step in many droplet-based applications. Geometry-mediated droplet splitting has the potential to reliably divide droplets and thus facilitate the implementation of this step. In this paper, we report the design of multi-furcating microfluidic channels for efficient droplet splitting. We studied the splitting regimes as the size of the mother droplets varied and investigated the dependence of the transition between splitting regimes on the capillary number and the dimensionless droplet length. We found that the results obtained with our device agreed with the reported dimensionless analysis law in T-junctions. We further investigated the effect of channel lengths on the volume allocation in branch channels and achieved droplet splitting with various splitting ratios. This study proposed an efficient on-demand droplet splitting method and the findings could potentially be applied in washing steps in droplet-based biological assays or assays that require aliquot.
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Affiliation(s)
- Zida Li
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Luoquan Li
- Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
| | - Meixiang Liao
- Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
| | - Liqun He
- Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
| | - Ping Wu
- Authors to whom correspondence should be addressed: and
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Vecchiolla D, Giri V, Biswal SL. Bubble-bubble pinch-off in symmetric and asymmetric microfluidic expansion channels for ordered foam generation. SOFT MATTER 2018; 14:9312-9325. [PMID: 30289417 DOI: 10.1039/c8sm01285g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
By incorporating the techniques of geometrically mediated splitting and bubble-bubble breakup, the present work offers a novel microfluidic foam generation system via production of segregated, mono- or bidisperse bubbles at capacities exceeding 10 000 bubbles per second. Bubble-bubble pinch-off is precise at high capillary numbers (Ca > 0.065), generating monodisperse or bidisperse daughter bubbles for a symmetric or an asymmetric expansion respectively. Bi- or tridisperse foam is produced as pinch-off perfectly alternates such that the system contains twice the number of fragmented bubbles as intact bubbles. A relationship between the upstream bubble extension and the capillary number demarcates the different regimes of pinch-off defined with respect to frequency and precision: non-splitting, irregular, polydisperse, and monodisperse (or bidisperse for an asymmetric expansion). For tridisperse foam generation via a fixed asymmetric expansion geometry, the wall bubble confinement can be tuned to adjust the pinch-off accuracy in order to access a spectrum of fragmented bubble size ratios. The simplicity in operating and characterizing our system will enable studies on dynamic bubble interactions and ordered, wet foam applications.
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Affiliation(s)
- Daniel Vecchiolla
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77005, USA.
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11
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Asymmetrical breakup and size distribution of droplets in a branching microfluidic T-junction. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0165-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Wang X, Liu Z, Pang Y. Droplet breakup in an asymmetric bifurcation with two angled branches. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.05.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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13
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Cheng WL, Sadr R, Dai J, Han A. Prediction of Microdroplet Breakup Regime in Asymmetric T-Junction Microchannels. Biomed Microdevices 2018; 20:72. [DOI: 10.1007/s10544-018-0310-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Droplet Breakup Dynamics in Bi-Layer Bifurcating Microchannel. MICROMACHINES 2018; 9:mi9020057. [PMID: 30393333 PMCID: PMC6187458 DOI: 10.3390/mi9020057] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/20/2018] [Accepted: 01/28/2018] [Indexed: 12/11/2022]
Abstract
Breakup of droplets at bi-layer bifurcating junction in polydimethylsiloxane (PDMS) microchannel has been investigated by experiments and numerical simulation. The pressure drop in bi-layer bifurcating channel was investigated and compared with single-layer bifurcating channel. Daughter droplet size variation generated in bi-layer bifurcating microchannel was analyzed. The correlation was proposed to predict the transition between breakup and non-breakup conditions of droplets in bi-layer bifurcating channel using a phase diagram. In the non-breakup regime, droplets exiting port can be switched via tuning flow resistance by controlling radius of curvature, and or channel height ratio. Compared with single-layer bifurcating junction, 3-D cutting in diagonal direction from bi-layer bifurcating junction induces asymmetric fission to form daughter droplets with distinct sizes while each size has good monodispersity. Lower pressure drop is required in the new microsystem. The understanding of the droplet fission in the novel microstructure will enable more versatile control over the emulsion formation, fission and sorting. The model system can be developed to investigate the encapsulation and release kinetics of emulsion templated particles such as drug encapsulated microcapsules as they flow through complex porous media structures, such as blood capillaries or the porous tissue structures, which feature with bifurcating junctions.
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15
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Wang X, Zhu C, Fu T, Qiu T, Ma Y. Critical condition for bubble breakup in a microfluidic flow-focusing junction. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.01.066] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Lu Y, Fu T, Zhu C, Ma Y, Li HZ. Dynamics of bubble breakup at a T junction. Phys Rev E 2016; 93:022802. [PMID: 26986389 DOI: 10.1103/physreve.93.022802] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Indexed: 06/05/2023]
Abstract
The gas-liquid interfacial dynamics of bubble breakup in a T junction was investigated. Four regimes were observed for a bubble passing through the T junction. It was identified by the stop flow that a critical width of the bubble neck existed: if the minimum width of the bubble neck was less than the critical value, the breakup was irreversible and fast; while if the minimum width of the bubble neck was larger than the critical value, the breakup was reversible and slow. The fast breakup was driven by the surface tension and liquid inertia and is independent of the operating conditions. The minimum width of the bubble neck could be scaled with the remaining time as a power law with an exponent of 0.22 in the beginning and of 0.5 approaching the final fast pinch-off. The slow breakup was driven by the continuous phase and the gas-liquid interface was in the equilibrium stage. Before the appearance of the tunnel, the width of the depression region could be scaled with the time as a power law with an exponent of 0.75; while after that, the width of the depression was a logarithmic function with the time.
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Affiliation(s)
- Yutao Lu
- State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Taotao Fu
- State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Chunying Zhu
- State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Youguang Ma
- State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Huai Z Li
- Laboratory of Reactions and Process Engineering, University of Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy cedex, France
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17
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Yu D, Zheng M, Jin T, Wang J. Asymmetric breakup of a droplet in an axisymmetric extensional flow. Chin J Chem Eng 2016. [DOI: 10.1016/j.cjche.2015.07.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Li H, Wu Y, Wang X, Zhu C, Fu T, Ma Y. Magnetofluidic control of the breakup of ferrofluid droplets in a microfluidic Y-junction. RSC Adv 2016. [DOI: 10.1039/c5ra21802k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Breakup of the ferrofluid droplets at the Y-junction divergence under various flow rate ratios.
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Affiliation(s)
- Huajun Li
- State Key Laboratory of Chemical Engineering
- Collaborative Innovation Center of Chemical science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Yining Wu
- State Key Laboratory of Chemical Engineering
- Collaborative Innovation Center of Chemical science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Xiaoda Wang
- State Key Laboratory of Chemical Engineering
- Collaborative Innovation Center of Chemical science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Chunying Zhu
- State Key Laboratory of Chemical Engineering
- Collaborative Innovation Center of Chemical science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Taotao Fu
- State Key Laboratory of Chemical Engineering
- Collaborative Innovation Center of Chemical science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Youguang Ma
- State Key Laboratory of Chemical Engineering
- Collaborative Innovation Center of Chemical science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
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19
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20
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Wang X, Zhu C, Wu Y, Fu T, Ma Y. Dynamics of bubble breakup with partly obstruction in a microfluidic T-junction. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.04.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Schmit A, Salkin L, Courbin L, Panizza P. Cooperative breakups induced by drop-to-drop interactions in one-dimensional flows of drops against micro-obstacles. SOFT MATTER 2015; 11:2454-2460. [PMID: 25668310 DOI: 10.1039/c4sm02036g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Depending on the capillary number at play and the parameters of the flow geometry, a drop may or may not break when colliding with an obstacle in a microdevice. Modeling the flow of one-dimensional trains of monodisperse drops impacting a micro-obstacle, we show numerically that complex dynamics may arise through drop-to-drop hydrodynamic interactions: we observe sequences of breakup events in which the size of the daughter drops created upon breaking mother ones becomes a periodic function of time. We demonstrate the existence of numerous bifurcations between periodic breakup regimes and we establish diagrams mapping the possible breakup dynamics as a function of the governing (physicochemical, hydrodynamic, and geometric) parameters. Microfluidic experiments validate our model as they concur very well with predictions.
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Affiliation(s)
- Alexandre Schmit
- IPR, UMR CNRS 6251, Campus Beaulieu, Université Rennes 1, 35042 Rennes, France.
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23
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Brouzes E, Kruse T, Kimmerling R, Strey HH. Rapid and continuous magnetic separation in droplet microfluidic devices. LAB ON A CHIP 2015; 15:908-19. [PMID: 25501881 PMCID: PMC4323160 DOI: 10.1039/c4lc01327a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We present a droplet microfluidic method to extract molecules of interest from a droplet in a rapid and continuous fashion. We accomplish this by first marginalizing functionalized super-paramagnetic beads within the droplet using a magnetic field, and then splitting the droplet into one droplet containing the majority of magnetic beads and one droplet containing the minority fraction. We quantitatively analysed the factors which affect the efficiency of marginalization and droplet splitting to optimize the enrichment of magnetic beads. We first characterized the interplay between the droplet velocity and the strength of the magnetic field and its effect on marginalization. We found that marginalization is optimal at the midline of the magnet and that marginalization is a good predictor of bead enrichment through splitting at low to moderate droplet velocities. Finally, we focused our efforts on manipulating the splitting profile to improve the enrichment provided by asymmetric splitting. We designed asymmetric splitting forks that employ capillary effects to preferentially extract the bead-rich regions of the droplets. Our strategy represents a framework to optimize magnetic bead enrichment methods tailored to the requirements of specific droplet-based applications. We anticipate that our separation technology is well suited for applications in single-cell genomics and proteomics. In particular, our method could be used to separate mRNA bound to poly-dT functionalized magnetic microparticles from single cell lysates to prepare single-cell cDNA libraries.
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Affiliation(s)
- Eric Brouzes
- Biomedical Engineering Department, Stony Brook University, Stony Brook, NY 11794-5281, USA.
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Salari A, Navi M, Dalton C. A novel alternating current multiple array electrothermal micropump for lab-on-a-chip applications. BIOMICROFLUIDICS 2015; 9:014113. [PMID: 25713695 PMCID: PMC4320149 DOI: 10.1063/1.4907673] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/23/2015] [Indexed: 05/11/2023]
Abstract
The AC electrothermal technique is very promising for biofluid micropumping, due to its ability to pump high conductivity fluids. However, compared to electroosmotic micropumps, a lack of high fluid flow is a disadvantage. In this paper, a novel AC multiple array electrothermal (MAET) micropump, utilizing multiple microelectrode arrays placed on the side-walls of the fluidic channel of the micropump, is introduced. Asymmetric coplanar microelectrodes are placed on all sides of the microfluidic channel, and are actuated in different phases: one, two opposing, two adjacent, three, or all sides at the same time. Micropumps with different combinations of side electrodes and cross sections are numerically investigated in this paper. The effect of the governing parameters with respect to thermal, fluidic, and electrical properties are studied and discussed. To verify the simulations, the AC MAET concept was then fabricated and experimentally tested. The resulted fluid flow achieved by the experiments showed good agreement with the corresponding simulations. The number of side electrode arrays and the actuation patterns were also found to greatly influence the micropump performance. This study shows that the new multiple array electrothermal micropump design can be used in a wide range of applications such as drug delivery and lab-on-a-chip, where high flow rate and high precision micropumping devices for high conductivity fluids are needed.
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Affiliation(s)
- A Salari
- Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary , Calgary, Alberta T2N 1N4, Canada
| | - M Navi
- Semnan University , Semnan, Iran
| | - C Dalton
- Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary , Calgary, Alberta T2N 1N4, Canada
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25
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Wang X, Zhu C, Fu T, Ma Y. Bubble breakup with permanent obstruction in an asymmetric microfluidic T-junction. AIChE J 2014. [DOI: 10.1002/aic.14704] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Xiaoda Wang
- State Key Laboratory of Chemical Engineering; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
| | - Chunying Zhu
- State Key Laboratory of Chemical Engineering; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
| | - Taotao Fu
- State Key Laboratory of Chemical Engineering; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
| | - Youguang Ma
- State Key Laboratory of Chemical Engineering; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
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26
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Wang X, Zhu C, Fu T, Ma Y. Critical lengths for the transition of bubble breakup in microfluidic T-junctions. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2014.02.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Fu T, Ma Y, Li HZ. Hydrodynamic feedback on bubble breakup at a T-junction within an asymmetric loop. AIChE J 2014. [DOI: 10.1002/aic.14377] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Taotao Fu
- State Key Laboratory of Chemical Engineering; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
- Laboratory of Reactions and Process Engineering; University of Lorraine; CNRS 1 rue Grandville BP 20451 Nancy Cedex 54001 France
| | - Youguang Ma
- State Key Laboratory of Chemical Engineering; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
| | - Huai Z. Li
- Laboratory of Reactions and Process Engineering; University of Lorraine; CNRS 1 rue Grandville BP 20451 Nancy Cedex 54001 France
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