ICTS:28713

Video URL

On scaling theories of vortex dynamics in two-dimensional turbulence

On scaling theories of vortex dynamics in two-dimensional turbulence

(2024). On scaling theories of vortex dynamics in two-dimensional turbulence. SciVideos. https://youtu.be/48HX6IIOd_I

On scaling theories of vortex dynamics in two-dimensional turbulence. SciVideos, May. 20, 2024, https://youtu.be/48HX6IIOd_I 

          @misc{ scivideos_ICTS:28713,
            doi = {},
            url = {https://youtu.be/48HX6IIOd_I},
            author = {},
            keywords = {},
            language = {en},
            title = {On scaling theories of vortex dynamics in two-dimensional turbulence},
            publisher = {},
            year = {2024},
            month = {may},
            note = {ICTS:28713 see, \url{https://scivideos.org/icts-tifr/28713}}
          }
Rajaram Lakkaraju
Talk numberICTS:28713
Source RepositoryICTS-TIFR
Source EventTheoretical and Practical Perspectives in Geophysical Fluid Dynamics
Collection

Abstract

 Batchelor's self-similarity and Kraichnan's inertial range work on two-dimensional turbulence are unsuccessful due to the formation of coherent vortices which generate spatial hierarchical structures with time. In particular, the vortices create spatial intermittency and non-Gaussianity, and mechanisms for inverse energy cascade and direct enstrophy transfer are still open to probe. Via numerical simulations and self-similar vortex theory, we quantified the vortex populations and found the energy spectrum at high wave numbers follows a steeper slope than that predicted by the Batchelor and Kraichnan theories. Also, we discuss the reasons for the decay of enstrophy, which is due to the debris that is created by the vortex collisions.