Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session L37: Rheology II
8:00 AM–10:23 AM,
Monday, November 20, 2023
Room: 203AB
Chair: Mona Kanso, Massachusetts Institute of Technology
Abstract: L37.00005 : Predicting Extensional Behaviors of Colloidal Dispersions through Piecewise Power Law Models*
8:52 AM–9:05 AM
Presenter:
Naimul Hoque
(Texas Tech University)
Authors:
Naimul Hoque
(Texas Tech University)
Gordon Christopher
(Texas Tech University)
Silica particles of three different diameters (100 nm, 500 nm, 1 μm) are dispersed in Polyethylene Glycol (PEG) at high volume fractions to create model non-Newtonian inks. A rotational rheometer is used to measure viscosity as a function of shear stress, and then a piecewise power law model is fitted to thinning, thickening, and plateau regimes. During extension, filament diameters thin like power law fluids. However, experimental threads thin faster and with power law exponents different than those predicted by the shear based piecewise power law model. Although this model predicted flowrates effectively, disagreement in extension can be understood through examination of the Deborah number, which correlates particle residence time to thread lifetime.
*Dr. Christopher gratefully acknowledge support from DOE/NNSA MSIPP Growing STEMS grant number DOE NA0003988 and Dr. Betsy Snell, Program Manager.
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