Abstract
Numerical predictions are presented for flow through and in a model forest on a two-dimensional hill. Calculations are performed with a finite volume numerical algorithm, using non-staggered non-orthogonal grid systems. To eliminate false diffusion errors, the convective terms in the governing equations are discretized using a highly accurate numerical scheme constructed from the class of total variation diminishing (TVD) schemes. The time averaged Navier-Stokes equations are closed by an extended k- ϵ eddy viscosity model including terms due to the drag caused by the canopy. The predictions are compared with reported LDV measurements obtained in an atmospheric boundary layer wind tunnel for different forested hill geometrical configurations. The calculations show good agreement with measurements concerning the strong influence of the tree cover on the separated flow region.
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