ICTS:28708

Video URL

Classical 1/3 Nusselt scaling in compressible convection for extreme Rayleigh numbers

Classical 1/3 Nusselt scaling in compressible convection for extreme Rayleigh numbers

(2024). Classical 1/3 Nusselt scaling in compressible convection for extreme Rayleigh numbers. SciVideos. https://youtu.be/x-J5SvFchL4

Classical 1/3 Nusselt scaling in compressible convection for extreme Rayleigh numbers. SciVideos, May. 19, 2024, https://youtu.be/x-J5SvFchL4 

          @misc{ scivideos_ICTS:28708,
            doi = {},
            url = {https://youtu.be/x-J5SvFchL4},
            author = {},
            keywords = {},
            language = {en},
            title = {Classical 1/3 Nusselt scaling in compressible convection for extreme Rayleigh numbers},
            publisher = {},
            year = {2024},
            month = {may},
            note = {ICTS:28708 see, \url{https://scivideos.org/icts-tifr/28708}}
          }
Harshit Tiwari
Talk numberICTS:28708
Source RepositoryICTS-TIFR
Source EventTheoretical and Practical Perspectives in Geophysical Fluid Dynamics
Collection

Abstract

In turbulent convection, a complex nonlinear problem, quantification of heat transport remains a challenge. Two competing theories for extreme turbulence or large Raleigh number (Ra) are (a) classical 1/3 scaling where the heat transport is proportional to Ra^{1/3}, and (b) ultimate ½ scaling where heat transport is proportional to Ra^{1/2}. We simulate compressible turbulent convection up to Ra = 10^{18}, which is the highest Ra achieved so far, and show agreement with the classical 1/3 scaling. We also show that the Reynolds number scales as Ra^{1/2}. Our work is a major step towards the resolution of heat transport in turbulent convection.