19.09：summer has come to an end

small wind

Finally, hot summer is over, and a comfortable season is coming.
I feel summer is hotter these days, and one cool wind is more valued year by year. Especially in the asphalt jungle, wind through trees is very comfortable.

Wind exists normally in nature, and doesn't depend on that place and season like Umikaze (wind coming in from the ocean) or Rikukaze (wind going out from the land).

Recently I learned about "Wind Tunnel," a free application for iPhone.
In the window of the application, lines (which indicate wind) run from left to right and change shape when touched, but never stop.

In the application, we can build up obstacle walls .
As we imagine, wind detours the walls and doesn't reach the back-side of the walls.

The window of the smart-phone is small, but when we build up walls which simulate buildings in the city, the lines of wind stop running and break into small dots and are brought to a standstill.

It's just like viewing a busy city. Small dots go into tiny spaces between walls, but don't run unless there is quite a large opening.

In the residential area of town, we can get more wind at the 2nd floor than the 1st floor; this is not due to the difference in level of the place, but rather, the fact that there are more obstacles affecting the 1st floor. Comfortable wind must exist there, but something blocks it.

In Japan, sun-light has been considered carefully and defined in the law, but wind, which is ambiguous, has been forgotten.

In the field of Meteorology or environmental engineering, many factors concerning wind are clear, but actually, it's frustrating that we cannot receive wind which exists nearby.

How to utilize the small opening between buildings?
How to get the comfortable wind through the tiny opening between buildings?
That application forced me to think about those questions this summer.

19.09.01