Abstract
Required computational domain size was investigated and new boundary treatments and numerical solution method were proposed for the numerical prediction of local wind in complex terrain and were verified by a wind tunnel test. The effect of computational domain height, width and the position of the inlet boundary on the flow field was examined. Buffer zones were added at inlet, outlet and side boundaries, in which the volume of the terrain is maintained. An additional domain was introduced at the windward of the analytical domain to take the effect of the upwind terrain into account. Numerical methods for linear equation systems were examined in detail and new method was proposed, which was found to be fast and stable. Comparison of the mean wind velocity field between the numerical predictions and the measurements shows that the proposed nonlinear model is significantly better than the conventional linear model.
