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. 2021 May 11;33(5):057107. doi: 10.1063/5.0050058

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© 2021 Author(s)

Published under license by AIP Publishing.

1070-6631/2021/33(5)/057107/14/$30.00

All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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FIG. 10. — Comparison of the I_risk map (ΔI_risk) at the breathing level between the downward and upward flow cases for the infector is (a) in the front and (b) in the middle of the classroom with the air cleaner located near the HUV. The ΔI_risk is defined as the I_risk of case FA2 subtracted by that of case A2 for (a) and the I_risk of case FB2 subtracted by that of case B2 for (b).