1:45 PM - 3:15 PM
[O08-P17] Relationship between winds around buildings, and distance buildings Using wind fannel experimetal equipment made by us
Keywords:wind around buildings, wind tunnel test
Many buildings are currently under construction, and it is known that this creates complex winds around buildings. In this study, we used a homemade wind tunnel experiment device to investigate how this complex wind around buildings is generated.
In the experiment, we first created Device A by arranging straws to make the wind go in a straight line and surrounding it with plastic cardboard. Inside Device A, we installed a stand and a light to place a model building on. We arranged the mosquito coil, Device A, and an electric fan in that order. At this time, we faced the electric fan in the opposite direction to Device A to stabilize the wind. We prepared two models of buildings and placed them inside Device A. We darkened the room, turned on the light, and turned on the electric fan. We observed the change in the wind around buildings (smoke from mosquito coils) by increasing the distance between the two building models by 0.7 cm each time. To make the observation easier, we attached plastic wrap to the sides of Device A, painted the plastic cardboard at the back black, and observed from the side by placing an object between the lower and upper building models to open the gap.
The experimental results were as follows.
When the spacing was 0.7cm, not much mosquito coil smoke passed between the building models.
When the spacing was 1.4cm, it was possible to see the mosquito coil smoke flowing vigorously between the building models.
When the spacing was 2.1cm, it was possible to see the mosquito coil smoke flowing through the center between the building models.
When the spacing was 2.8cm, it was possible to see the mosquito coil smoke flowing overall between the building models.
When the spacing was 3.5cm, it was possible to see the mosquito coil smoke flowing through the center between the building models.
When the spacing was 4.2cm, it was possible to see the mosquito coil smoke flowing thinly overall between the building models.
When the spacing was 4.9cm, it was possible to see the mosquito coil smoke flowing thinly overall between the building models.
When the spacing was 5.6cm, it was possible to see the mosquito coil smoke flowing thinly overall between the building models.
From the above, we can see that when the spacing is 0.7cm, there is almost no wind,
and when the spacing is 1.4cm, 2.1cm, and 3.5cm, the wind flows strongly through the center.
We can see that when the spacing is 2.8cm, 4.2cm, 4.9cm, and 5.6cm, the wind flows all over. The reason why the wind flows all over when the spacing is 2.8cm but flows strongly through the center when the spacing is 3.5cm may be because the wind was a little stronger or there was less smoke.
In the experiment, we first created Device A by arranging straws to make the wind go in a straight line and surrounding it with plastic cardboard. Inside Device A, we installed a stand and a light to place a model building on. We arranged the mosquito coil, Device A, and an electric fan in that order. At this time, we faced the electric fan in the opposite direction to Device A to stabilize the wind. We prepared two models of buildings and placed them inside Device A. We darkened the room, turned on the light, and turned on the electric fan. We observed the change in the wind around buildings (smoke from mosquito coils) by increasing the distance between the two building models by 0.7 cm each time. To make the observation easier, we attached plastic wrap to the sides of Device A, painted the plastic cardboard at the back black, and observed from the side by placing an object between the lower and upper building models to open the gap.
The experimental results were as follows.
When the spacing was 0.7cm, not much mosquito coil smoke passed between the building models.
When the spacing was 1.4cm, it was possible to see the mosquito coil smoke flowing vigorously between the building models.
When the spacing was 2.1cm, it was possible to see the mosquito coil smoke flowing through the center between the building models.
When the spacing was 2.8cm, it was possible to see the mosquito coil smoke flowing overall between the building models.
When the spacing was 3.5cm, it was possible to see the mosquito coil smoke flowing through the center between the building models.
When the spacing was 4.2cm, it was possible to see the mosquito coil smoke flowing thinly overall between the building models.
When the spacing was 4.9cm, it was possible to see the mosquito coil smoke flowing thinly overall between the building models.
When the spacing was 5.6cm, it was possible to see the mosquito coil smoke flowing thinly overall between the building models.
From the above, we can see that when the spacing is 0.7cm, there is almost no wind,
and when the spacing is 1.4cm, 2.1cm, and 3.5cm, the wind flows strongly through the center.
We can see that when the spacing is 2.8cm, 4.2cm, 4.9cm, and 5.6cm, the wind flows all over. The reason why the wind flows all over when the spacing is 2.8cm but flows strongly through the center when the spacing is 3.5cm may be because the wind was a little stronger or there was less smoke.