Open Conference Systems, StatPhys 27 Main Conference

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Synchronizing turbulence via nudging
Patricio Clark Di Leoni, Andrea Mazzino, Luca Biferale

##manager.scheduler.building##: Edificio San Jose Aula Magna
Date: 2019-07-10 06:15 PM – 06:30 PM
Last modified: 2019-06-13


Nudging is a data assimilation technique used to control the evolution of a dynamical system. Here we characterize the technique for three-dimensional isotropic turbulent flows, using both data provided in configuration space of in Fourier space. We show that if sufficient data is supplied the nudged turbulent flow can synchronize to the data given (even in points or scales that are not nudged). In other cases, partial synchronization can also be achieved. We also demonstrate how in the presence of large-scale coherent structures, as is the case for rotating turbulent flows, nudging works remarkably better than in the isotropic case. Nudging is thus presented as a tool to probe for the key degrees of freedom in a turbulent field.