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. 2021 Jul 21;204:108167. doi: 10.1016/j.buildenv.2021.108167

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Fig. 8 — Results of Simulation B with double hung windows placed in between the rows of students. (a) Streamlines originating around the heads of the two infected individuals from 0 to 60 s and colored according to velocity. (b) Volume rendering of CO mass fraction. The transparent limit is set at 2x well mixed, and the opaque scale at 4x well mixed. (c) Colored rendering of CO mass fraction right below mouth level of seated students. (d) Colored rendering of CO mass fraction right below mouth level of standing teacher. The lower limit is set at 1x well mixed, and the upper limit at 4x well mixed.