Pressure-driven flow focusing of two miscible liquids
| Autor: | Doriane Vesperini, Ilyesse Bihi, Badr Kaoui, Anne Le Goff |
|---|---|
| Přispěvatelé: | Biomécanique et Bioingénierie (BMBI), Université de Technologie de Compiègne (UTC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Microfluidics
Computational Mechanics 01 natural sciences 010305 fluids & plasmas Viscosity Flow focusing 0103 physical sciences [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics 010306 general physics Fluid Flow and Transfer Processes Physics geography Jet (fluid) geography.geographical_feature_category [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Mechanics of the fluids [physics.class-ph] Mechanical Engineering [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph] Mechanics [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] Condensed Matter Physics Inlet Aspect ratio (image) Volumetric flow rate Core (optical fiber) Mechanics of Materials |
| Zdroj: | Physics of Fluids Physics of Fluids, American Institute of Physics, 2019, 31 (6), pp.062001. ⟨10.1063/1.5099897⟩ |
| ISSN: | 1070-6631 1089-7666 |
| DOI: | 10.1063/1.5099897⟩ |
| Popis: | International audience; Flow focusing consists in injecting a core liquid into another surrounding flowing sheath liquid. Here we investigate experimentally the influence of imposing pressure to generate coflow of two miscible liquids. We inject water in the central inlet of a cross-junction microfluidic device and different mixtures of glycerol-water in the two lateral inlets. A pressure generator is used to control the flows and the established flow rates are monitored in both inlets. We draw a state diagram that delimits the regions of the coflow, the inner and outer back flows. We measure the width of the jet as a function of different control parameters: the inlet pressures, the flow rates, the viscosity contrast and the channel aspect ratio. We show that the jet width can be controlled by tuning the internal to external pressure ratio solely, provided that the viscosity contrast is low. We discuss the possibility to use such a system to center particles in a channel. |
| Databáze: | OpenAIRE |
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