Fig. 2

a Representation of the computed temperature within the room in a 2D slice. The red and dark blue colors are representative of the maximal and minimal temperatures, respectively. One can note the higher temperature near the body shapes, highlighting the presence of the heat flux released by human subjects. b Representation of the gas motion in a 2D slice. The arrows indicate the local direction of the gas mixture and are colored by the local gas mixture velocity (the red and dark blue colors are representative of the maximal and minimal velocity magnitudes, respectively). The influence of the natural convection is clearly shown by the upward direction of the gas mixture above the healthcare professional, where the temperature is the highest. Note that these figures are the results of one of the considered scenarios, but are representative of all the scenarios