Joint IMAGe GTP Seminar - Lagrangian Relative Dispersion: From Observations to Modeling

11/19/2015 - 11:00am
ML - Main Seminar Room

Alessandra S. Lanotte
Institute of Atmospheric and Climate Sciences – National Research Council (Lecce, Italy) National Institute for Nuclear Physics (Italy)

The extreme behaviour of clouds or plumes of pollution. Thanks to a very large and accurate computational study, we have recently explored Lagrangian dispersion regimes dominated by extreme random events produced by turbulent fluctuations. After briefly reviewing these results, I will present a new model for the sub-grid scale velocities of tracer particles dispersed in incompressible turbulent flows. The model embeds the multi-scale nature of turbulent flows, that is essential to reproduce multi-particle dispersion. Using it as a Lagrangian sub-grid-scale model in a large-eddy simulation, we can study the turbulent dispersion of temporally and spatially correlated clouds of particles in the convective planetary boundary layer.

This seminar will be webcast live at: http://www.fin.ucar.edu/it/mms/ml-live.htm

Thursday, 19 November 2015, 11:00 AM
NCAR- Mesa Lab
Main Seminar Room

Contact for this seminar: Kris Marwitz, kmarwitz@ucar.edu