Two-phase flow patterns and size distribution of droplets in a microfluidic T-junction: Experimental observations in the squeezing regime - 28/03/17
, Kamel Daoud a, Lounès Tadrist bBenvenuto su EM|consulte, il riferimento dei professionisti della salute.
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Abstract |
Generating micrometer sized droplets has been studied in a microfluidic system with T-junction geometry 250 μm in internal diameter and with PTFE capillary tubing. Several experiments were conducted by varying the flow rate of the dispersed phase from 
to 
and that of the continuous phase from 
to 
. The visualization of different flow regimes (drop, plug, and annular) was carried out for three configurations (not inverted in a horizontal position, inverted in a horizontal position, and inverted in a vertical position) for low capillary numbers. The model of Gauss was also chosen for a droplet size distribution in the dispersed phase, with the flow quality x varying from 0.016 to 0.44. The evolution of the drop size distribution as a function of the flow quality in the dispersed phase shows that the variation coefficient of the droplet's diameter is inversely proportional to the flow quality.
Keywords : Microfluidics, Two-phase flow patterns, T-junction, Coefficient of variation, Size distribution
Mappa
Vol 345 - N° 4
P. 259-270 - aprile 2017 Ritorno al numero
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