Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session G15: Flow Control: Wakes and Internal Flows
10:35 AM–12:45 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B302
Chair: Miki Amitay, Rensselaer Polytechnic Institute
Abstract ID: BAPS.2018.DFD.G15.3
Abstract: G15.00003 : Flow around a circular cylinder with axially or helically arranged holes*
11:01 AM–11:14 AM
Presenter:
Jihee Kim
(Ulsan Natl Inst of Sci & Tech)
Authors:
Jihee Kim
(Ulsan Natl Inst of Sci & Tech)
Jooha Kim
(Ulsan Natl Inst of Sci & Tech, Ulsan Natl Inst of Sci & Tech)
In this study, we investigate the characteristics of flow around a circular cylinder with axially or helically arranged holes. The experiment is performed in a wind tunnel at Re = 80,000 while varying the angle of attack (α; the angle between the reference hole center axis and the streamwise direction) from 0° to 90°. We directly measure the drag forces on a circular cylinder with axially or helically penetrated holes and compare them with that on a circular cylinder with no hole. Axially arranged holes reduce the drag at low α but rather increase the drag at high α, as compared to that with no hole. On the other hand, the drag is reduced by helically arranged holes, regardless of the angle of attack. The velocity fields around a circular cylinder with and without holes are measured by particle image velocimetry, and the flow mechanisms responsible for the drag reduction are to be suggested in the presentation.
*Supported by NRF(2016R1D1A1B03933176) and UNIST(1.180015.01).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.G15.3
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