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Flow-to-fracture transition and pattern formation in a discontinuous shear thickening fluid
Communications Physics, Volume: 3, Issue: 1
Swansea University Authors:
Deren Ozturk, Miles Morgan, Bjornar Sandnes
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DOI (Published version): 10.1038/s42005-020-0382-7
Abstract
Recent theoretical and experimental work suggests a frictionless-frictional transition with increasing inter-particle pressure explains the extreme solid-like response of discontinuous shear thickening suspensions. However, analysis of macroscopic discontinuous shear thickening flow in geometries ot...
| Published in: | Communications Physics |
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| ISSN: | 2399-3650 |
| Published: |
Springer Science and Business Media LLC
2020
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa54268 |
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| Abstract: |
Recent theoretical and experimental work suggests a frictionless-frictional transition with increasing inter-particle pressure explains the extreme solid-like response of discontinuous shear thickening suspensions. However, analysis of macroscopic discontinuous shear thickening flow in geometries other than the standard rheometry tools remain scarce. Here we use a Hele-Shaw cell geometry to visualise gas-driven invasion patterns in discontinuous shear thickening cornstarch suspensions. We plot quantitative results from pattern analysis in a volume fraction-pressure phase diagram and explain them in context of rheological measurements. We observe three distinct pattern morphologies: viscous fingering, dendritic fracturing, and system-wide fracturing, which correspond to the same packing fraction ranges as weak shear thickening, discontinuous shear thickening, and shear-jammed regimes. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
UKRI, EP/S034587/1 |
| Issue: |
1 |