Phys. Rev. Lett. 100, 134503 (2008) [4 pages]“Bottleneck Effect” in Two-Dimensional MicrofluidicsReceived 26 October 2007; published 2 April 2008 An anomalously long transient is needed to achieve a steady pressurization of a fluid when forced to flow through micronarrowed channels under constant mechanical driving. This phenomenon, known as the “bottleneck effect” is here revisited from a different perspective, by using confined displacements of interfacial fluids. Compared to standard microfluidics, such effect admits in this case a neat quantitative characterization, which reveals intrinsic material characteristics of flowing monolayers and permits to envisage strategies for their controlled micromanipulation. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.134503
DOI:
10.1103/PhysRevLett.100.134503
PACS:
47.61.−k, 68.18.−g
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