The three-dimensional non-hydrostatic meteorological model WRF (Weather Research and Forecast) is used in Large-Eddy Simulation (LES) mode to reproduce the coherent structures associated to the Urban Heat Island (UHI) circulation. Horizontal resolution of 50 m and a vertically stretched grid with a finer resolution close to the surface is employed in the numerical model in order to compute the mean variables and the turbulence statistics. Experiments are conducted in a thermally controlled test section filled with distilled water. The velocity field is determined through image analysis techniques. Temperatures are measures by means of thermocouples arrays. Different UHI intensities and background initial stratifications are investigated with both the numerical code and the experimental apparatus and results compared with literature data. The turbulent structures of the UHI circulation are correctly reproduced by the LES model while the standard deviations are underestimated in the laboratory experiments.
High resolution numerical and experimental modeling of the Urban Heat Island circulation / Catalano, Franco; Falasca, Serena; Moroni, Monica; Cenedese, Antonio. - (2011). (Intervento presentato al convegno 7th International Symposium on Stratified Flows tenutosi a Rome (Italy) nel 22 – 26/08/2011).
High resolution numerical and experimental modeling of the Urban Heat Island circulation
CATALANO, Franco;FALASCA, SERENA;MORONI, Monica;CENEDESE, Antonio
2011
Abstract
The three-dimensional non-hydrostatic meteorological model WRF (Weather Research and Forecast) is used in Large-Eddy Simulation (LES) mode to reproduce the coherent structures associated to the Urban Heat Island (UHI) circulation. Horizontal resolution of 50 m and a vertically stretched grid with a finer resolution close to the surface is employed in the numerical model in order to compute the mean variables and the turbulence statistics. Experiments are conducted in a thermally controlled test section filled with distilled water. The velocity field is determined through image analysis techniques. Temperatures are measures by means of thermocouples arrays. Different UHI intensities and background initial stratifications are investigated with both the numerical code and the experimental apparatus and results compared with literature data. The turbulent structures of the UHI circulation are correctly reproduced by the LES model while the standard deviations are underestimated in the laboratory experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
