Fig. 2.

Visual comparison between discrete particle simulation and tracer gas simulation. (a) Paths of water droplets with diameters between 0.5 and 5 μm and turbulent dispersion modeled by discrete random walks. (b) Volume rendering of CO mass fraction with transparent being 0.0010 and below, which is approximately twice the well-mixed concentration of CO in the room, and red being 0.0020 and above, which is approximately four times the well-mixed concentration. (c) Paths of water droplet particles with color showing velocity of the particles on a scale from 0 m/s to 0.2 m/s. (d) Same volume rendering of CO as in (b) except colored to show velocity of the gas on the same scale as (c). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)