An analytical function is found and is used as boundary condition for the barycentre trajectories in a fluctuating plume model. The skewness profile in the fluctuating plume model is accounted for at two levels: in the reflections at the boundaries and in the concentration PDF relative to the centroid position. The model is tested in convective (positively skewed) and canopy (negatively skewed) turbulence. The mean and fluctuations of the concentration field in canopy turbulence are compared to experimental data showing the important improvements determined by the inclusion of the skewness effects close to the ground.
New Boundary Conditions for Positive and Negative Skewed Turbulence in Fluctuating Plume Models / L. Mortarini, E. Ferrero, P. Franzese (NATO SECURITY THROUGH SCIENCE SERIES. B, PHYSICS AND BIOPHYSICS). - In: Air Pollution Modeling and its Application XX[s.l] : Springer, 2010. - ISBN 978-90-481-3810-4. (( Intervento presentato al 30. convegno NATO/SPS International Technical Meeting on Air Pollution Modeling and Its Applications tenutosi a San Francisco, nel 2009.
New Boundary Conditions for Positive and Negative Skewed Turbulence in Fluctuating Plume Models
L. Mortarini
Primo
;
2010
Abstract
An analytical function is found and is used as boundary condition for the barycentre trajectories in a fluctuating plume model. The skewness profile in the fluctuating plume model is accounted for at two levels: in the reflections at the boundaries and in the concentration PDF relative to the centroid position. The model is tested in convective (positively skewed) and canopy (negatively skewed) turbulence. The mean and fluctuations of the concentration field in canopy turbulence are compared to experimental data showing the important improvements determined by the inclusion of the skewness effects close to the ground.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
