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Issue 46, 2017
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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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Supplementary files

Article information


Submitted
25 Apr 2017
Accepted
24 Oct 2017
First published
24 Oct 2017

This article is Open Access

Soft Matter, 2017,13, 8745-8755
Article type
Paper

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, 13, 8745
DOI: 10.1039/C7SM00817A

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