Hydrodynamic and Contact Contributions to Continuous Shear Thickening in Colloidal Suspensions
Year: 2015
Type: article
Abstract: Shear thickening is a widespread phenomenon in suspension flow that, despite sustained study, is still the subject of much debate. The longstanding view that shear thickening is due to hydrodynamic clusters has been challenged by recent theory and simulations suggesting that contact forces dominate, not only in discontinuous, but also in continuous shear thickening. Here, we settle this dispute using shear reversal experiments on micron-sized silica and latex particles to measure directly the hydrodynamic and contact force contributions to shear thickening. We find that contact forces dominate even continuous shear thickening. Computer simulations show that these forces most likely arise from frictional interactions.
Source: Physical Review Letters
Institutions: Cornell University, University of Edinburgh
Language: English
Subfield: Fluid Flow and Transfer Processes
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Awards: G1164573391, G1523469116, Using confocal rheometry to investigate shear thickening suspensions, G3987786, G4597130270, G4889303464, G4964432009, G6129426985, G6160081557, UNS: Imaging inhomogeneous stress networks in colloidal glasses and gels to determine their role in the bulk response of disordered suspensions, Design Principles for New Soft Materials
OpenAlex ID: W2107915697