Competing Timescales Lead to Oscillations in Shear-Thickening Suspensions
Date Available
2019-06-18Type
datasetData Creator
Richards, James ARoyer, John R
Liebchen, Benno
Guy, Ben M
Poon, Wilson CK
Publisher
University of Edinburgh. School of Physics. Institute for Condensed Matter and Complex SystemsRelation (Is Referenced By)
https://doi.org/10.1103/PhysRevLett.123.038004Metadata
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Citation
Richards, James A; Royer, John R; Liebchen, Benno; Guy, Ben M; Poon, Wilson CK. (2019). Competing Timescales Lead to Oscillations in Shear-Thickening Suspensions, [dataset]. University of Edinburgh. School of Physics. Institute for Condensed Matter and Complex Systems. https://doi.org/10.7488/ds/2573.Description
Competing timescales generate novelty. Here, we show that a coupling between the timescales imposed by instrument inertia and the formation of interparticle frictional contacts in shear-thickening suspensions leads to highly asymmetric shear-rate oscillations. Experiments tuning the presence of oscillations by varying the two timescales support our model. The observed oscillations give access to a shear-jamming portion of the flow curve that is forbidden in conventional rheometry. Moreover, the oscillation frequency allows us to quantify an intrinsic relaxation time for particle contacts. The coupling of fast contact network dynamics to a slower system variable should be generic to many other areas of dense suspension flow, with instrument inertia providing a paradigmatic example. For further information see the related pre-print: Richards, J. A., et al. "Competing Time Scales Lead to Oscillations in Shear-Thickening Suspensions." arXiv preprint arXiv:1902.07655 (2019).The following licence files are associated with this item: