4.7 Getting started - WindSim

12 WindSim AS
Terrain
The first step in the micro-siting of a wind farm is the generation of a 3D model in the Terrain
module. This involves choosing the horizontal extension of the area to simulate and the
height above ground that you want to use in your simulations. This volume (computational
domain) is then discretized into a system of hexahedral cells called grid or mesh. The
computational domain is therefore built on a digital terrain in *.gws format containing
information about elevation and roughness.
WindSim can be run by using the default settings in properties, or the user defined settings
can be specified. Notice that all bold settings in the Properties panel are the ones that have
been specified by the user.
In the Demo version of WindSim, the maximum number of cells in vertical direction has been
set to 10 while the total maximum number of cells has been limited to 5000. In the
commercial version of WindSim the maximum number of cells would typically be limited by
the available computer resources. Models with several million cells could be simulated on a
high performance PC. The very restrictive limitation of the size of the computational model
means that you cannot trust the results of simulations run with the demo version of WindSim.
Run the Terrain module by clicking on the Start button with the default settings (see below).
You should now see the Figure 4 of Hundhammerfjellet in the Report frame (see figure
below).