S-shaped flow curves of shear thickening suspensions: Direct observation of frictional rheology
| العنوان: | S-shaped flow curves of shear thickening suspensions: Direct observation of frictional rheology |
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| المؤلفون: | Daniel Bonn, Bart Weber, Henri de Cagny, Zhongcheng Pan |
| المساهمون: | Soft Matter (WZI, IoP, FNWI) |
| المصدر: | Physical Review E, 92(3):032202. American Physical Society |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Materials science, Rheometer, FOS: Physical sciences, Condensed Matter - Soft Condensed Matter, Non-Newtonian fluid, Simple shear, Shear rate, Shear modulus, Physics::Fluid Dynamics, Condensed Matter::Soft Condensed Matter, Critical resolved shear stress, Shear stress, Soft Condensed Matter (cond-mat.soft), Composite material, Shear flow |
| الوصف: | We study the rheological behavior of concentrated granular suspensions of simple spherical particles. Under controlled stress, the system exhibits an S-shaped flow curve (stress vs. shear rate) with a negative slope in between the low-viscosity Newtonian regime and the shear thickened regime. Under controlled shear rate, a discontinuous transition between the two states is observed. Stress visualization experiments with a novel fluorescent probe suggest that friction is at the origin of shear thickening. Stress visualization shows that the stress in the system remains homogeneous (no shear banding) if a stress is imposed that is intermediate between the high and low-stress branches. The S-shaped shear thickening is then due to the discontinuous formation of a frictional force network between particles upon increasing the stress. 5 pages + 6 figures |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1539-3755 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c605f930aafb42ade174d75ed165bbd6 https://doi.org/10.1103/physreve.92.032202 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c605f930aafb42ade174d75ed165bbd6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15393755 |
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