Details

Autor(en) / Beteiligte

• Sarkar, Sumantra
• Shatoff, Elan
• Ramola, Kabir
• Mari, Romain
• Morris, Jeffrey
• Chakraborty, Bulbul
• Delenne, J.Y.
• Nezamabadi, S.
• Luding, S.
• Radjai, F.

Titel

Shear-induced organization of forces in dense suspensions: signatures of discontinuous shear thickening

Ist Teil von

• EPJ Web of Conferences, 2017-01, Vol.140, p.9045

Ort / Verlag

Les Ulis: EDP Sciences

Erscheinungsjahr

2017

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear rate. The origin of this discontinuous shear thickening (DST) has been ascribed to the transformation of lubricated contacts to frictional, particle-on-particle contacts. Recent research on the flowing and jamming behavior of dense suspensions has explored the intersection of ideas from granular physics and Stokesian fluid dynamics to better understand this transition from lubricated to frictional rheology. DST is reminiscent of classical phase transitions, and a key question is how interactions between the microscopic constituents give rise to a macroscopic transition. In this paper, we extend a formalism that has proven to be successful in understanding shear jamming of dry grains to dense suspensions. Quantitative analysis of the collective evolution of the contactforce network accompanying the DST transition demonstrates clear changes in the distribution of microscopic variables, and leads to the identification of an “order parameter” characterizing DST.