ICTS:28729

Video URL

On two-dimensional turbulence over random topography

On two-dimensional turbulence over random topography

(2024). On two-dimensional turbulence over random topography. SciVideos. https://youtu.be/XK0MEF9UbUg

On two-dimensional turbulence over random topography. SciVideos, May. 24, 2024, https://youtu.be/XK0MEF9UbUg 

          @misc{ scivideos_ICTS:28729,
            doi = {},
            url = {https://youtu.be/XK0MEF9UbUg},
            author = {},
            keywords = {},
            language = {en},
            title = {On two-dimensional turbulence over random topography},
            publisher = {},
            year = {2024},
            month = {may},
            note = {ICTS:28729 see, \url{https://scivideos.org/icts-tifr/28729}}
          }
Krishna Priya V R
Talk numberICTS:28729
Source RepositoryICTS-TIFR
Source EventTheoretical and Practical Perspectives in Geophysical Fluid Dynamics
Collection

Abstract

A fundamental model for large-scale ocean flow is two-dimensional (2D) turbulence above topography and has been studied since the 1970s. Ocean observations show that long-lived vortices sit astride prominent topographic features. Using a suite of numerical experiments, we illustrate the phenomenology of random topographic turbulence. As in two-dimensional turbulence, the energy of the flow is transferred towards larger scales of motion; after some rotation periods, however, the process is halted as the flow pattern becomes aligned along the topographic contours. It is found that global energy decays faster as the roughness of topography increases due to more effective viscous dissipation. The quasi-steady state reached by the flow is characterized by the relationship between potential vorticity and stream function which is found using minimum enstrophy arguments.