TY - JOUR
T1 - Influence of turbulence closure on the simulation of flow and dispersion in complex terrain
AU - Alessandrini, Stefano
AU - Ferrero, Enrico
AU - Castelli, Silvia Trini
AU - Anfossi, Domenico
PY - 2005
Y1 - 2005
N2 - A dispersion simulation test for the RAMS-MIRS-SPRAY (RMS) modelling system in real complex terrain is presented. As a test case the TRACT campaign was chosen because this data set allows the comparison of both the meteorological variables and the tracer concentrations. Particular attention was focused on testing alternative turbulence closures and assessing their influence on modelling both the meteorology and the dispersion. Firstly, the different turbulence closures introduced in the meteorological model are compared. Secondly, the dispersion simulations are performed using the turbulence provided by the different models. It is demonstrated that using different closure models for turbulence modifies also the mean flow. Concerning the tracer dispersion, the new closures utilising a fully 3D equation for the turbulent kinetic energy seem to give promising results.
AB - A dispersion simulation test for the RAMS-MIRS-SPRAY (RMS) modelling system in real complex terrain is presented. As a test case the TRACT campaign was chosen because this data set allows the comparison of both the meteorological variables and the tracer concentrations. Particular attention was focused on testing alternative turbulence closures and assessing their influence on modelling both the meteorology and the dispersion. Firstly, the different turbulence closures introduced in the meteorological model are compared. Secondly, the dispersion simulations are performed using the turbulence provided by the different models. It is demonstrated that using different closure models for turbulence modifies also the mean flow. Concerning the tracer dispersion, the new closures utilising a fully 3D equation for the turbulent kinetic energy seem to give promising results.
KW - Atmospheric dispersion
KW - Experimental campaign
KW - Meteorology and air pollution modelling
KW - Turbulence closures
UR - http://www.scopus.com/inward/record.url?scp=23844552179&partnerID=8YFLogxK
U2 - 10.1504/IJEP.2005.007391
DO - 10.1504/IJEP.2005.007391
M3 - Article
SN - 0957-4352
VL - 24
SP - 154
EP - 170
JO - International Journal of Environment and Pollution
JF - International Journal of Environment and Pollution
IS - 1-4
ER -