When simulating the ventilation situation at the new national stadium, which will be the main stadium of the Tokyo Olympics and Paralympics, research groups such as Kyushu University announced that the air in the field was replaced in 22 minutes by a breeze.
The New National Stadium is the main stadium of the Tokyo Olympics and Paralympics, which can accommodate 60,000 spectators and play soccer and athletics. It has an open structure such as no roof.
Research groups such as Associate Professor Takanori Uchida of Kyushu University used a supercomputer to simulate the ventilation conditions in the field of the New National Stadium.
As a result, when a north wind with a wind speed of 3 meters, which is considered to be a breeze, blows around the stadium, the air on the field is replaced from the windward side, and after about 90 seconds, it goes out from the top of the stadium without a roof. Approximately 22 minutes after it began to be released, almost all of the air in the field was replaced.
Associate Professor Uchida says, "Although the story is limited to the field, not the audience seats, I would like it to be useful for infection control of the new coronavirus."