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Polymer conformation during flow in porous media

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Abstract

Molecular conformations of individual polymers during flow through porous media are directly observed by single-DNA imaging in microfluidics. As the Weissenberg number increases during flow (Wi > 1), we observe two types of elastic instabilities: (a) stationary dead-zone and (b) time-dependant dead-zone washing. When stretched polymer chains enter a dead-zone, they first re-coil and, once inside the dead-zone, they rotate and re-stretch again. The probability distribution of DNA chains under the stretched condition inside the dead-zone is found to be heterogeneous with a broad distribution.

Graphical abstract: Polymer conformation during flow in porous media

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Publication details

The article was received on 25 Apr 2017, accepted on 24 Oct 2017 and first published on 24 Oct 2017


Article type: Paper
DOI: 10.1039/C7SM00817A
Citation: Soft Matter, 2017, Advance Article
  • Open access: Creative Commons BY license
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    Polymer conformation during flow in porous media

    D. Kawale, G. Bouwman, S. Sachdev, P. L. J. Zitha, M. T. Kreutzer, W. R. Rossen and P. E. Boukany, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM00817A

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