New sensor detects saliva flight range when sneezing

A soft sensor has been created that reads the dynamics of the flight of fluids during sneezing or exhalation.

Existing epidemiological models of infectious respiratory diseases do not take into account the physics behind disease transmission.

Svetaprovo Chaudhury, professor of engineering at the University of Toronto
But fluids and their dynamics are critical for forming pathogens that affect the transmission of infectious diseases.

Lydia Buruiba, director of the Laboratory for Hydrodynamics of Disease Transmission at the Massachusetts Institute of Technology, explained that a person does not just release isolated droplets during exhalation. During this process, a turbulent multiphase cloud comes out of it. According to Bouruiba, it is critical for expanding the range and changing the physics of droplet evaporation within this range.

Buruiba cited several infectious diseases as examples, including COVID-19. When disease vectors are inhaled, this process involves varying air velocities, and this does not include droplets of saliva.

To calculate how long it will take for viral droplets to get to you indoors, the team used mathematical equations commonly used in the perfume industry. The perfume sprayed on by the person at the next table or booth will reach your nose thanks to the turbulence in the air. In the same way, small droplets spread, which the infected person spreads.

This showed us how useless most social distancing rules are when we’re indoors.

Research text

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