Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session X46: Particle-Laden Flow: Non-Spherical Particles II
8:00 AM–10:36 AM,
Tuesday, November 21, 2023
Room: 209BC
Chair: Anke Lindner, ESPCI Paris
Abstract: X46.00010 : Measurements of spinning and tumbling rates of Kolmogorov scale micro-plastic fibres
9:57 AM–10:10 AM
Presenter:
Vlad Giurgiu
(Vienna Univ of Technology)
Authors:
Vlad Giurgiu
(Vienna Univ of Technology)
Giuseppe Caridi
(TU Wien)
Marco DePaoli
(University of Twente, Physics of Fluids)
Alfredo Soldati
(Vienna Univ of Technology)
Six high-speed cameras image the fibres at the channel centre and in a near-wall region. We employ and further refine a technique of tomographic fibre reconstruction and tracking. Their curved shape is used to define a fibre-fixed reference frame and measure its time-resolved orientation. Thus measurements of tumbling and spinning rates are enabled. We provide a discussion about the uncertainty on the rotation rates based on their shape and angular displacement between time-steps. Based on converged statistics, we observed that the mean and mean square spinning are higher than tumbling rates at both channel centre and near-wall region. Our results are original, because previous measurements are restricted to rotation rates of longer rods in homogeneous isotropic turbulence or to tumbling rates only.
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