Don't let COVID get the better of you 4 (room with four windows)

Let's take a look!

What type of experiment is this?

Experimental procedure and explanation:

• By using cardboard, we developed a model of a room that is 10-cm wide, 10-cm long, and 5-cm high. In addition, 1-cm wide windows were added at each end of the front and back walls. A transparent board is attached to the ceiling.
• When air is blown from the front, you can create a breezeway and increase ventilation to a much greater extent than if you only have one window.
• However, there are areas in the center where the flow is slow and the ventilation is poor.
• In a real room, the air inside is stirred up by people around, fluctuating winds, and the mixing and diffusion of flows, and thus, even areas of weak flow have a slightly greater ventilation effect.
• The important result is that a large number of windows increases the airflow and improve ventilation.
• This experimental video was produced with the support of JSPS Grant-in-Aid for Scientific Research 18K03956.

[Keywords]	Ventilation, separation
[Related items]	Don't let COVID get the better of you 2 (room with two windows)
[Reference]	Ryozo Ishiwata and Mitsumasa Nemoto, "The Wondeｒ of Flow" Kodansha Blue Backs, p. 152. Ryozo Ishiwata, "Illustrated Fluid Dynamics Trivia", Natsume Publishing, P68-69.

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