| Partner: O. Cybulski |
Recent publications
| 1. | Jakieła S.♦, Korczyk P.M., Makulska S.♦, Cybulski O.♦, Garstecki P.♦, Discontinuous Transition in a Laminar Fluid Flow: A Change of Flow Topology inside a Droplet Moving in a Micron-Size Channel, PHYSICAL REVIEW LETTERS, ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.108.134501, Vol.108, No.13, pp.134501-1-5, 2012 Abstract: Even at moderate values of Reynolds number [e.g., Re=O(1) ] a curved interface between liquids can induce an abrupt transition between topologically different configurations of laminar flow. Here we show for the first time direct evidence of a sharp transition in the speed of flow of a droplet upon a small increase of the value of the capillary number above a threshold and the associated change of topology of flow. The quantitative results on the dependence of the threshold capillary number on the contrast of viscosities and on the direction of transition cannot be explained by any of the existing theories and call for a new description. Keywords:speed of droplets, microfluidics, droplets Affiliations:
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| 2. | Korczyk P.M., Cybulski O.♦, Makulska A.♦, Garstecki P.♦, Effects of unsteadiness of the rates of flow on the dynamics of formation of droplets in microfluidic systems, LAB ON A CHIP, ISSN: 1473-0197, DOI: 10.1039/C0LC00088D, Vol.11, No.1, pp.173-175, 2011 Abstract: Oscillations of the input rates of flow have a significant impact on the dynamics of formation of droplets in microfluidic systems and on the quality of generated emulsions. Keywords:microfluidics, T-junction, droplet generation, syringe pump Affiliations:
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