Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session X13: Cavitation, Nucleation, Collapse, Coalescence II
8:00 AM–10:10 AM,
Tuesday, November 21, 2023
Room: 143C
Chair: Huixuan Wu, Florida State University
Abstract: X13.00003 : A hybrid multi-scale model for cavitating flows*
8:26 AM–8:39 AM
Presenter:
Aditya Madabhushi
(University of Minnesota Twin Cities)
Authors:
Aditya Madabhushi
(University of Minnesota Twin Cities)
Krishnan Mahesh
(University of Michigan)
Cavitating flows possess large vapor cavities that can be represented on a computational grid alongside small bubbles that cannot be similarly resolved. We develop a compressible multiscale model where the resolved mixture of liquid and large-scale vapor is governed by the compressible Navier Stokes equations and the sub-grid vapor bubbles are tracked in a Lagrangian sense. For the subgrid bubbles, a novel ‘kR-RP’ equation is developed by integrating the spherical momentum equation from the bubble surface (r = R) to a finite distance (r = kR, k - constant parameter). The variable k allows the bubble to consistently respond to a local external pressure rather than the pressure at infinite distance. The classic RP variants (e.g. Keller-Miksis, original RP equation) are recovered when k and c approach infinity. We demonstrate the hybrid model’s insensitivity to the value of k, and its ability to capture inter-bubble interactions among sub-grid bubbles, and between resolved and sub-grid bubbles.
*This work is supported by the Office of Naval Research
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