Paper Number
SC34 

Session
Suspensions, Colloids, and Granular Materials

Title
Transition from the viscous to inertial regime in non-Brownian suspensions

Presentation Date and Time
October 23, 2019 (Wednesday) 1:30

Track / Room
Track 2 / Room 304

Authors (Click on name to view author profile)

1. Madraki, Yasaman (Ohio University)
2. Ovarlez, Guillaume (Universite de Bordeaux, Physical Chemistry)
3. Hormozi, Sarah (Ohio University)

Author and Affiliation Lines (in printed abstract book)
Yasaman Madraki¹, Guillaume Ovarlez², and Sarah Hormozi^3
1Ohio University, Athens, OH 45701; ²Physical Chemistry, Universite de Bordeaux, Pessac, Bordeaux 33600, France; ³Ohio University, Athens, OH 45701

Speaker / Presenter 
Madraki, Yasaman

Text of Abstract
In shear thickening suspensions, viscosity appears to increase when the shear rate increases. In non-Brownian suspensions, different modes of shear thickening behavior have been identified. These modes are attributed to different physical mechanisms such as hydrodynamic interactions among particles, transition from frictionless to frictional rheology, transition from a viscous to an inertial regime, microstructural effects, etc. We have designed a model non-Brownian suspension to study experimentally the viscous to inertial mode of shear thickening behavior. We have developed a series of comprehensive rheometry tests to provide an understanding of the inertial shear thickening mode in detail. We provide a closure for shear stresses in inertial suspensions and we test this closure by studying boundary driven flows of dense suspensions.