Japan ( Tokyo) A group of researchers says the air over the field of the Tokyo Games’ main stadium can be replaced almost completely in 22 minutes by natural breezes.
The group, led by Kyushu University Associate Professor Uchida Takanori, carried out a supercomputer simulation of air ventilation at the new National Stadium in Tokyo.
The stadium has roofs over the spectator seats, but the field itself is not covered.
The researchers say they found that if a northerly wind of 3 meters per second, or 10.8 kilometers per hour, blows near the stadium, the air above the field begins to be released in about 90 seconds.
They say their study shows the air is almost completely replaced in about 22 minutes.
Uchida says the simulation was limited to the air over the field, and not the spectator stands, but he hopes it will help in drawing up measures to prevent the spread of the coronavirus.
The stadium can accommodate 60,000 spectators. It will be the venue for the opening and closing ceremonies of the Olympics and Paralympics, and track-and-field and other events.
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