Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session P03: Invited Talk: Rayleigh-Bénard TurbulenceInvited
|
Hide Abstracts |
Chair: Detlef Lohse, University of Twente Room: Ballroom C |
Monday, November 20, 2023 11:45AM - 12:20PM |
P03.00001: Towards the ultimate regime in Rayleigh-Bénard turbulence<br type="_moz" /> Invited Speaker: Olga Shishkina Rayleigh-Bénard convection – a fluid flow in a container heated from below and cooled from above – is one of the paradigmatic systems in fluid dynamics. This also holds for the turbulent case. Here the key response of the system is the heat transport (Nusselt number Nu) and the key question is: how does Nu depend on the thermal driving strength (Rayleigh number Ra)? We start this talk with a brief digression into the history of the theory of heat transport scaling relations for large Ra, and in particular for the ultimate regime, where the scaling laws do not change anymore with the further growing Ra. We discuss not only the outcome but also the difference in the assumptions of the various scaling models, which helps to understand the applicability limits of the various models. We then focus on the factors that influence the transition to the ultimate regime, including the container shape, wall roughness, specific thermal boundary conditions, and possible non-Oberbeck-Boussinesq effects, as well as the multiple-state nature of turbulent thermal convection.<br type="_moz" /> |
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