The VENFOR project: a k-e model for simulating wind flow in heterogeneous forest canopies
2003
Foudhil, Hadjira | Brunet, Yves | Caltagirone, Jean-Paul
The purpose of this study is to develop a numerical tool for the prediction of turbulent wind flow over heterogeneous terrain in the surface boundary layer. The model is based on the Reynolds equations, averaged in space to consider the interaction with plant canopies. Turbulence is modelled by a k-ε closure scheme, extended by including source-sink terms due to the drag forces on plant elements. The numerical code is validated against a series of data sets from several in-situ and wind-tunnel experiments: smooth-to-rough surface change, wind flow in a horizontally homogeneous canopy, flow over a forest-clearing-forest sequence. The comparison between modelled and measured data show that the model provides adequate simulations in most cases. Some limitations of the model are also shown in regions with strong flow distorsion.
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