Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session S01: Non-Equilibrium and Transient Mechanics of Granular and Soft Materials II
8:00 AM–10:48 AM,
Thursday, March 9, 2023
Room: Room 124
Sponsoring
Units:
GSNP DSOFT DFD
Chair: Abe Clark, The Naval Postgraduate School; Abhinendra Singh, Case Western Reserve University
Abstract: S01.00008 : Shear-driven ordering and disordering of frictional sphere suspensions in two 2D
9:48 AM–10:00 AM
Presenter:
Abhishek K Sharma
(The University of Chicago)
Authors:
Abhishek K Sharma
(The University of Chicago)
Abhinendra Singh
(University of Chicago)
Juan J De Pablo
(University of Chicago)
At low shear stresses, when hydrodynamics is dominant, the particles form layered assemblies. The particles oscillate between hexagonal and square order in order to flow in a worm-like cooperation. This results in a moderate degree of long-range order in the flowing state. In contrast, at higher shear stress, as friction gets activated, the system transitions to a less ordered state with transient hexagonal close-packed microdomains. The worm-like cooperative motion is largely absent, along with a general absence of long-range order.
We explore the transition between these two states in rate-controlled and stress-controlled simulations, revealing abrupt and continuous changes in global hexatic order parameter, respectively. The distinction between the two states gradually disappears at lower packing fractions as the low-shear regime becomes increasingly disordered.
Introducing rolling friction further constrains the motion of these particles and disrupts order in a qualitatively distinct manner compared to sliding friction alone. This model sets up the groundwork for more realistic studies in shear-induced ordering in granular materials and colloids with frictional constraints.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700