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Fall A, Bertrand F, Hautemayou D, et al. Macroscopic discontinuous shear thickening versus local shear jamming in cornstarch. Phys Rev Lett. 2015;114(9):098301doi: 10.1103/PhysRevLett.114.098301.
Fall, A., Bertrand, F., Hautemayou, D., Mezière, C., Moucheront, P., Lemaître, A., & Ovarlez, G. (2015). Macroscopic discontinuous shear thickening versus local shear jamming in cornstarch. Physical review letters, 114(9), 098301. https://doi.org/10.1103/PhysRevLett.114.098301
Fall, A, et al. "Macroscopic discontinuous shear thickening versus local shear jamming in cornstarch." Physical review letters vol. 114,9 (2015): 098301. doi: https://doi.org/10.1103/PhysRevLett.114.098301
Fall A, Bertrand F, Hautemayou D, Mezière C, Moucheront P, Lemaître A, Ovarlez G. Macroscopic discontinuous shear thickening versus local shear jamming in cornstarch. Phys Rev Lett. 2015 Mar 06;114(9):098301. doi: 10.1103/PhysRevLett.114.098301. Epub 2015 Mar 03. PMID: 25793857.
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Phys Rev Lett. 2015 Mar 06;114(9):098301. doi: 10.1103/PhysRevLett.114.098301. Epub 2015 Mar 03.

Macroscopic discontinuous shear thickening versus local shear jamming in cornstarch.

Physical review letters

A Fall, F Bertrand, D Hautemayou, C Mezière, P Moucheront, A Lemaître, G Ovarlez

Affiliations

  1. Laboratoire Navier (UMR CNRS 8205), Université Paris Est, 77420 Champs-sur-Marne, France.

PMID: 25793857 DOI: 10.1103/PhysRevLett.114.098301

Abstract

We study the emergence of discontinuous shear thickening (DST) in cornstarch by combining macroscopic rheometry with local magnetic resonance imaging measurements. We bring evidence that macroscopic DST is observed only when the flow separates into a low-density flowing and a high-density jammed region. In the shear-thickened steady state, the local rheology in the flowing region is not DST but, strikingly, is often shear thinning. Our data thus show that the stress jump measured during DST, in cornstarch, does not capture a secondary, high-viscosity branch of the local steady rheology but results from the existence of a shear jamming limit at volume fractions quite significantly below random close packing.

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