New regime of droplet generation in a T-shape microfluidic junction
| Autor: | Nathalie Tarchichi, Jean-François Manceau, Franck Chollet |
|---|---|
| Přispěvatelé: | Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), MicroMachines Centre (MMC), Nanyang Technological University [Singapour], Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph] Range (particle radiation) Continuous phase modulation 010401 analytical chemistry Dispersity Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular physics 0104 chemical sciences Electronic Optical and Magnetic Materials [SPI.MAT]Engineering Sciences [physics]/Materials Physics::Fluid Dynamics Drag Phase (matter) Materials Chemistry Deformation (engineering) Phase velocity [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Microfluidics and Nanofluidics Microfluidics and Nanofluidics, Springer Verlag, 2013, 14 (1-2), pp.45-51. ⟨10.1007/s10404-012-1021-8⟩ Microfluidics and Nanofluidics, 2013, 14 (1-2), pp.45-51 |
| ISSN: | 1613-4982 1613-4990 |
| DOI: | 10.1007/s10404-012-1021-8⟩ |
| Popis: | We present an experimental study of a new regime of monodisperse micro-droplet generation that we named the balloon regime. A dispersion of oil in water in a T-junction microfluidic system was studied. Several microfluidic devices having different cross-sections of the continuous and the dispersed phases micro-channels were tested. This new regime appears only for low- dispersed phase velocity. The micro-droplet size is mainly related to the geometry of the T-junction micro-channels especially its width and depth, and independent of the continuous and dispersed phases velocities. In our experiments, the velocities of the continuous and the dispersed phases $$\overline v_{\rm c}$$ and $$\overline v_{\rm d}$$ respectively, have been varied in a wide range: $$\overline v_{\rm c}$$ from 0.5 to 500 mm/s, and $$\overline v_{\rm d}$$ from 0.01 to 30 mm/s. We show that the continuous phase only controls the micro-droplet density, while the dispersed phase linearly changes the frequency of the micro-droplet generation. Another particularity of the present regime, which differentiates it from all other known regimes, is that the micro-droplet retains its circular shape throughout its formation at the T junction, and undergoes no deformation due to the drag forces. We propose a mechanism to explain the formation of micro-droplets in this new regime. |
| Databáze: | OpenAIRE |
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