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15 mins
A Lagrangian sub-grid model for the dispersion of clouds of tracers
Federico Toschi, Irene M. Mazzitelli, Alessandra S. Lanotte
Session: Large Eddy Simulation 2
Session starts: Thursday 27 August, 15:00
Presentation starts: 16:30
Room: Room E

Federico Toschi ()
Irene M. Mazzitelli ()
Alessandra S. Lanotte ()

Turbulence models are expected to satisfy the conflicting requirements of accuracy and computational efficiency. Here we discuss a new model that was recently developed in order to accurately and efficiently describe the dynamic of a clouds of tracers particles in Large Eddy Simulations of homogeneous and isotropic turbulent flows. The models incorporates the multi-scale nature of time and space turbulent velocity correlations that are essential in order to correctly reproduce the relative dispersion of multi-particle clouds. The model can be seen as an off-grid solver for the Eulerian velocity field at the positions of a given number of Lagrangian tracers that self-consistently move with it. Extensions to non homogeneous and isotropic turbulence as well as to the dynamics of particles will be discussed.