Experimental Investigation of Exhaled Aerosol Transport Under Two Ventilation Systems

Figures & data

FIG. 1 Configurations of the testing chamber and locations of measuring points.

TABLE 1 Measuring locations of air flow and particle concentration

		Coordinates (m)
Air flow	Particle
measurement	measurement	X	Y	Z
RE_33	RE_33	0.25	0.3	0.33
L3_33	L3_33	0.25	0.5	0.33
L3_25	L3_25	0.25	0.5	0.25
EX_33	N/A	0.25	0.7	0.33
EX_25	N/A	0.25	0.7	0.25
NW_33	N/A	0.25	0.9	0.33
NW_25	N/A	0.25	0.9	0.25
EX_TOP	N/A	0.25	0.7	0.5

FIG. 2 Average vertical temperature along the center of the chamber (X = 0.25 m, Y = 0 ∼ 0.5 m, Z = 0.5 m).

FIG. 3 Air velocity profiles at different locations before injection for MV.

FIG. 4 Air velocity profiles at different locations before injection for DIS.

FIG. 5 Two sets of air velocity measurements at L3_33 after injection for both ventilation schemes.

FIG. 6 Air velocity profiles at L3_25 after injection for both ventilation schemes.

FIG. 7 Air velocity profiles at RE_33 after injection for both ventilation schemes.

FIG. 8 (a) Particle concentration profiles at EX_33, NW_33, and NW_25 for MV. (b) Particle concentration profiles at L3_25, EX_25, and RE_33 for MV.

FIG. 9 (a) Particle concentration profiles at EX_33, NW_33, and NW_25 for DIS. (b) Particle concentration profiles at L3_25, EX_25, and RE_33 for DIS.

FIG. 10 (a) Transient ventilation effectiveness (ε) and peak-to-peak ratio (PPR) of the measuring positions for MV. (b) Transient ventilation effectiveness (ε) and peak-to-peak ratio (PPR) of the measuring positions for DIS.