Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session X45: Suspensions: Rheology
8:00 AM–10:23 AM,
Tuesday, November 21, 2023
Room: 209A
Chair: Paulo Arratia, University of Pennsylvania
Abstract: X45.00007 : Nonlinear Rheology of Dense Non-Brownian Suspensions: What is the role of particle shape?*
9:18 AM–9:31 AM
Presenter:
Sarah Hormozi
(Cornell University)
Authors:
Sarah Hormozi
(Cornell University)
Enzo D’Ambrosio
(Cornell University)
Donald L Koch
(Cornell University)
nonspherical shape and often exhibit nonlinear behavior such as shear thinning and/or shear thickening even when the suspending fluid is Newtonian. This talk focuses on such nonlinear rheological behaviors and it is motivated by one central question: ``What is the role of particle shape?". We will present our recent results concerning the rheology of two suspensions, which differ solely through the particle shapes. One suspension was made of spheres, and the other of globular facetted particles produced by crushing identical spheres. The suspension of crushed particles exhibited a higher viscosity than the suspension of spheres for the same volume fraction and applied stress and displayed a steeper shear thinning behavior. The results show that the stronger nonlinear rheology of crushed particles stems from a combination of stress-weakening sliding friction and extra resistance to rolling motion due to the angular shape of the crushed particles. We will use these recent findings to put forward a scaling analysis to systematically explore the nonlinear rheology of dense non-Brownian suspensions made of nonspherical particles of arbitrary shape with the interplay of shape with hydrodynamic, colloidal, and contact forces.
*This work was supported by National Science Foundation (NSF) (Grant No. CBET-1554044-CAREER & CBET-2210322).
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