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We show that enhanced turbulent mixing can be used to mitigate airborneCOVID-19 transmission by dispersing virus-laden clouds in enclosed, poorlyventilated spaces. A simple system of fan-driven turbulent jets is designed soas to minimize peak concentrations of passive contaminants on time scales shortcompared to the room ventilation time. Standard Reynolds-average and similaritymethods are used, and combinations of circular and radial wall jets areconsidered. The turbulent diffusivity and contaminant mixing time arecalculated. Results indicate that this approach can significantly reduce peakvirus cloud concentrations, especially in small spaces with low occupancy, suchas restrooms. Turbulent mixing is, of course, ineffective in the absence ofventilation.

How Turbulent Jets Can Disperse Virus Clouds in Poorly Ventilated Spaces