Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session T41: Bubbly Flows III
4:25 PM–6:09 PM,
Monday, November 20, 2023
Room: 206
Chair: Simo Makiharju, UC Berkeley
Abstract: T41.00004 : Direct Numerical Simulation on Millimeter-sized Air Bubbles in Turbulent Channel Flow*
5:04 PM–5:17 PM
Presenter:
Sangwon Kim
(RIKEN, Center for Computational Science)
Authors:
Sangwon Kim
(RIKEN, Center for Computational Science)
Nobuyuki Oshima
(Hokkaido University)
Yuichi Murai
(Hokkaido University)
Hyun Jin Park
(Hokkaido University)
Millimeter-sized bubbles have high deformability, and influenced heavily by turbulent flow. We reproduced turbulent flow conditions through DNS. Also, the flow on the hull surface (Couette flow), which is driven differently from channel flow (Poiseuille flow), has yet to have its effect on millimeter-sized bubbles elucidated.
To investigate this, we generated Couette flow in turbulent channel flow. We validated our model by comparing results with experiments of a single millimeter-sized bubble in turbulent channel flow. Unique bubble characteristics (direction and deformation of the bubble) were found in Couette flow that differed from Poiseuille flow.
Using the validated model, we reproduced bubbly flow with multiple millimeter-sized bubbles. Our simulations aligned well with experimental observations. Additionally, we discerned differences according to the flow conditions.
*This work was supported by the MEXT Doctoral program for Data-Related InnoVation Expert Hokkaido University (D-DRIVE-HU) program; the high-performance computing project (210160, 220032, 230002); the Fundamental Research Development Association for Shipbuilding and Offshore (REDAS); and the F3 Engineering Education and Research Center, Faculty of Engineering, Hokkaido University.
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