Towards a unified description of the rheology of hard-particle suspensions
Date Available
2015-07-30Type
datasetData Creator
Guy, BMHermes, M
Poon, Wilson CK
Relation (Is Referenced By)
http://arxiv.org/pdf/1511.08011.pdfMetadata
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Citation
Guy, B. M.; Hermes, M.; Poon, W. C. K.. (2015). Towards a unified description of the rheology of hard-particle suspensions, [dataset]. https://doi.org/10.7488/ds/286.Description
The rheology of suspensions of Brownian, or colloidal, particles (diameter~$d \lesssim 1~\mu$m) differs markedly from that of larger grains ($d \gtrsim 50~\mu$m). Each of these two regimes has been separately studied, but the flow of suspensions with intermediate particle sizes ($1~\mu\textrm{m} \lesssim d \lesssim 50~\mu$m), which occur ubiquitously in applications, remains poorly understood. By measuring the rheology of suspensions of hard spheres with a wide range of sizes, we show experimentally that shear thickening drives the transition from colloidal to granular flow across the intermediate size regime. This insight makes possible a unified description of the (non-inertial) rheology of hard spheres over the full size spectrum. Moreover, we are able to test a new theory of friction-induced shear thickening, showing that our data can be well fitted using expressions derived from it.The following licence files are associated with this item: