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The Greenpower VWT is a, web based, Virtual Wind Tunnel. It allows
pupils to test their 3D computer models in a software implemented
wind tunnel and determine aerodynamic features in an easy to use
environment.
The system uses Computational
Fluid Dynamics software algorithems running on a remote network of
parallel processing computers. This uses heavy weight mathematics to
simulate
the airflow over the models shape in a virtual wind tunnel. The system
is web based. This simplifies usage of the system as no software has to
be installed on local workstations, except for a suitable 3D CAD
program of the users preference and optionaly, a 3D data viewer.
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To
use, the model design has to be drawn, to scale, in a 3D CAD program.
Programs such as Pro/Engineer, Autocad, Pro/Desktop and the Open
Source, Blender program can be used. The input to the VWT is
a STL file which is exported from the 3D CAD program. The
model can then be simulated in the wind tunnel. The VWT
software will calculate the models drag force in Newtons, the frontal
area and Cd values as well provide
data for a 3D data viewing package to allow streamers, arrows and
coloured "hot spots" to be shown enabling users to gain an
understanding of the nature of the airflow over their designs.
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