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Original Articles

Effect of coherent structures on particle transport and deposition from a cough

ORCID Icon & ORCID Icon
Pages 425-433 | Received 26 Oct 2021, Accepted 01 Feb 2022, Published online: 16 Mar 2022

Figures & data

Figure 1. Velocity contours in x/De = 1 plane from (a) realistic geometry and (b) canonical rectangular slot with tabs (figure re-created based on Zaman Citation1996).

Figure 1. Velocity contours in x/De = 1 plane from (a) realistic geometry and (b) canonical rectangular slot with tabs (figure re-created based on Zaman Citation1996).

Figure 2. (a) Snapshot of particle release during cough with contours of average velocity in the y = 0 plane superimposed. (b) Average velocity contours in y = 0 plane with angle of cough boundaries indicated. The boundary is defined by points at which the velocity is below 0.5 m/s, or less than 10% of the maximum jet velocity of 5 m/s.

Figure 2. (a) Snapshot of particle release during cough with contours of average velocity in the y = 0 plane superimposed. (b) Average velocity contours in y = 0 plane with angle of cough boundaries indicated. The boundary is defined by points at which the velocity is below 0.5 m/s, or less than 10% of the maximum jet velocity of 5 m/s.

Table 1. Particle load (mass per size class) used for each experiment. The particles nominally had density of water ( saliva), ρ =1 ± 0.01 g/cm3.

Figure 3. Downstream velocity profiles along z/b = −1 plane.

Figure 3. Downstream velocity profiles along z/b = −1 plane.

Figure 4. Modified Stokes number, St*, along the horizontal z/b = −1 plane and centerline particle concentration, with standard deviation due to test-to-test variation given by shaded error bars.

Figure 4. Modified Stokes number, St*, along the horizontal z/b = −1 plane and centerline particle concentration, with standard deviation due to test-to-test variation given by shaded error bars.

Figure 5. Comparison of (a) false color image of 22–27 μm (red) and 180–212 μm (green) particle deposition with (b) measured 22–27 μm particle deposition during a single experiment with image view indicated by dashed line.

Figure 5. Comparison of (a) false color image of 22–27 μm (red) and 180–212 μm (green) particle deposition with (b) measured 22–27 μm particle deposition during a single experiment with image view indicated by dashed line.
Supplemental material

Supplemental Material

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