Tuesday, August 6, 2013

1308.1002 (Nicolas Fernandez et al.)

Microscopic mechanism for the shear-thickening of non-Brownian

Nicolas Fernandez, Roman Mani, David Rinaldi, Dirk Kadau, Martin Mosquet, Helene Lombois-Burger, Juliette Cayer-Barrioz, Hans J. Herrmann, Nicholas D. Spencer, Lucio Isa
We propose a simple model, supported by contact-dynamics simulations as well as rheology and friction measurements, that links the transition from continuous to discontinuous shear-thickening in dense granular pastes to distinct lubrication regimes in the particle contacts. We identify a local Sommerfeld number that determines the transition from Newtonian to shear-thickening flows, and then show that the suspension's volume fraction and the boundary lubrication friction coefficient control the nature of the shear-thickening transition, both in simulations and experiments.
View original: http://arxiv.org/abs/1308.1002

No comments:

Post a Comment