Wind canals serve to physically illustrate and quantify the effects of wind currents on natural and artificial objects in our environment.
In this building block a portable wind canal is used, allowing the user to direct air currents toward specific objects and then quantify the results (e.g. currents acting on a hedge or a building; wind erosion etc.)
The canal’s dimensions are 0.6 x 0.4 x 0.5 m (long version) and 1.5 m (short version). The canal weighs around 30 kg. The canal’s size makes it is easily transportable and can also be used in a lecture hall. The wind is created using a ventilator in a portable case around 0.6 x 0.5 x 0.5 m. Energy is supplied using a voltage of 230 V. The speed is seamlessly adjustable between 0-20m/s.
The canal is constructed out of Plexiglas and a wooden bottom. The individual components are around 1m long and are therefore portable. The length used is also flexible.
The quantitative assessment of wind velocity can be measured by hand with a wind-measuring device, thereby allowing a rough description of wind velocity along the entire wind canal. When using the particles (e.g. grain kernels when documenting erosion phenomena), a time loop camera can capture the movement of the particles, which can subsequently be documented and analyzed. The phenomena can be carried out in a lecture hall in front of a large number of students with the help of a small video camera. Didactically speaking, it is better to let students conduct the research themselves.
A box of wooden building blocks is available for experiments. Using this, simple objects from our environment can be constructed as models.
A short instructional guide makes conducting the experiment simple.
Using clear techniques, it is possible to create and understand complex wind current structures (e.g. lee effect on buildings, soil erosion by wind, etc.)