The case study of 'Bosco Fontana', a densely-vegetated forest located in the north of Italy, is analysed both experimentally and numerically to characterise the internal ventilation of a finite forest with a vertically non-homogeneous canopy. Measurements allow for the evaluation of the turbulent exchange across the forest canopy. The case study is then reproduced numerically via a two-dimensional RANS simulation, successfully validated against experimental data. The analysis of the internal ventilation leads to the identification of seven regions of motion along the predominate-wind direction, for whose definition a new in-canopy stability parameter was introduced. In the vertical direction, the non-homogeneity of the canopy leads to the separation of the canopy layer into an upper foliage layer and a lower bush layer, characterised respectively by an increasing streamwise velocity and turbulence intensity, and a weak backflow. The conclusions report an improved description of the dynamic layer and regions of motion presented in the literature.
Cintolesi, C., Barbano, F., Trudu, P. L., Finco, A., Gerosa, G. A., Di Sabatino, S., Characterisation of flow dynamics within and around an isolated forest, through measurements and numerical simulations, <<AGRICULTURAL AND FOREST METEOROLOGY>>, 2023; 339 (N/A): 109557-N/A. [doi:10.1016/j.agrformet.2023.109557] [https://hdl.handle.net/10807/253414]
Characterisation of flow dynamics within and around an isolated forest, through measurements and numerical simulations
Finco, Angelo;Gerosa, Giacomo Alessandro;
2023
Abstract
The case study of 'Bosco Fontana', a densely-vegetated forest located in the north of Italy, is analysed both experimentally and numerically to characterise the internal ventilation of a finite forest with a vertically non-homogeneous canopy. Measurements allow for the evaluation of the turbulent exchange across the forest canopy. The case study is then reproduced numerically via a two-dimensional RANS simulation, successfully validated against experimental data. The analysis of the internal ventilation leads to the identification of seven regions of motion along the predominate-wind direction, for whose definition a new in-canopy stability parameter was introduced. In the vertical direction, the non-homogeneity of the canopy leads to the separation of the canopy layer into an upper foliage layer and a lower bush layer, characterised respectively by an increasing streamwise velocity and turbulence intensity, and a weak backflow. The conclusions report an improved description of the dynamic layer and regions of motion presented in the literature.File | Dimensione | Formato | |
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Cintolesi, GEROSA, 2023 - AGRFORMET - Characterisation of flow dynamics within and around an isolated forest.pdf
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