1. Shear thickening of dense suspensions: The role of friction
- Author
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Vishnu Sivadasan, Eric Lorenz, Daniel Bonn, Alfons G. Hoekstra, IvI Research (FNWI), Computational Science Lab (IVI, FNWI), Soft Matter (WZI, IoP, FNWI), and IoP (FNWI)
- Subjects
Fluid Flow and Transfer Processes ,Physics ,Dilatant ,Friction coefficient ,Mechanical Engineering ,Coordination number ,Computational Mechanics ,FOS: Physical sciences ,Condensed Matter - Soft Condensed Matter ,Condensed Matter Physics ,Microstructure ,01 natural sciences ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,Condensed Matter::Soft Condensed Matter ,Shear (geology) ,Rheology ,Mechanics of Materials ,0103 physical sciences ,Soft Condensed Matter (cond-mat.soft) ,Composite material ,010306 general physics - Abstract
Shear thickening of particle suspensions is caused by a transition between lubricated and frictional contacts between the particles. Using three-dimensional (3D) numerical simulations, we study how the interparticle friction coefficient (μm) influences the effective macroscopic friction coefficient (μ) and hence the microstructure and rheology of dense shear thickening suspensions. We propose expressions for μ in terms of distance to jamming for varying shear stresses and μm values. We find μ to be rather insensitive to interparticle friction, which is perhaps surprising but agrees with recent theory and experiments. Unifying behaviors were observed between the average coordination numbers of particles across a wide range of viscous numbers and μm values.
- Published
- 2019
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