A Caltech Library Service

Alternative Frictional Model for Discontinuous Shear Thickening of Dense Suspensions: Hydrodynamics

Jamali, Safa and Brady, John F. (2019) Alternative Frictional Model for Discontinuous Shear Thickening of Dense Suspensions: Hydrodynamics. Physical Review Letters, 123 (13). Art. No. 138002. ISSN 0031-9007. doi:10.1103/physrevlett.123.138002.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


A consensus has emerged that a constraint to rotational or sliding motion of particles in dense suspensions under flow is the genesis of the discontinuous shear thickening (DST) phenomenon. We show that tangential fluid lubrication interactions due to finite-sized asperities on particle surfaces effectively provide these constraints, changing the dynamics of particle motion. By explicitly resolving for the surface roughness of particles, we show that, while smooth particles exhibit continuous shear thickening, purely hydrodynamic interactions in rough particles result in DST. In contrast to the frictional contact model, the hydrodynamic model predicts negative first and second normal stress differences for dense suspensions in the shear thickened state.

Item Type:Article
Related URLs:
URLURL TypeDescription
Jamali, Safa0000-0001-6031-3779
Brady, John F.0000-0001-5817-9128
Additional Information:© 2019 American Physical Society. Received 2 May 2019; revised manuscript received 24 July 2019; published 25 September 2019.
Issue or Number:13
Record Number:CaltechAUTHORS:20190925-102153055
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98851
Deposited By: Tony Diaz
Deposited On:25 Sep 2019 17:24
Last Modified:16 Nov 2021 17:42

Repository Staff Only: item control page