We know that wind is the movement of air, formed by changes in atmospheric pressure, usually going from high pressure to low pressure.
Building a structure up means blocking the normal flow of wind and often causes two common phenomena:
As the wind blows through the narrow range between buildings, the pressure decreases and the wind speed increases.
In other words, when the fluid passes through the narrow position of the pipe, the initial pressure decreases, but at the same time the velocity increases. And the same goes for wind, when the wind blows through a narrow range between buildings, the pressure decreases and the wind speed increases.
Normally when building a building, in addition to many other calculations, one must simulate the wind model affecting that building in order to first ensure the integrity and safety of the building, secondly, to ensure the integrity and safety of the building. limit the occurrence of these phenomena.
Depending on the strength of the effects, the wind on the ground can be twice as strong as it would be if it were moving overhead.
The effects mentioned above can be a safety hazard for people living and working below the building. Depending on the strength and weakness of the effects, the wind on the ground can be twice as strong as when it moves at a height of several tens of meters above.
For example, a wind with a speed of about 40km/h can be amplified up to 55km/h below the building. And it is known that only a wind of 60km/h is enough to blow a person away.