Health
Studies have found that coughing downwards can reduce the spread of droplets.
Coughing to the ground may reduce the spread of droplets and aerosols, and may reduce the spread of respiratory illnesses such as COVID-19, according to new research.
Researchers see their findings journal Advances in AIP on Tuesday.. They placed the mannequin model in a water tunnel and illuminated the tunnel with a laser to visualize how the particles flow. We also tilted the mannequin at different angles to simulate a person going up and down stairs.
As the mannequin moves, a flow field or wake is created along that path. Researchers have found that particles taller than the head can easily ride in the wake.
On the other hand, when the mannequin is tilted forward to simulate a person walking upstairs, researchers find that the wake causes particles located below the head to be angled downwards, preventing them from traveling long distances. discovered.
Lead author Hongping Wang calls this the “most amazing” discovery.
“Due to different wakes, we observe two different patterns of droplet dispersion,” Wang said in a news release. “These results suggest that most droplets need to be coughed with their heads facing the ground to ensure they enter the wake area.”
Research is not without its limits. Instead of using an air-filled environment, researchers used lasers in a water-filled environment to simulate and visualize air flow. Wang wants to follow up on his experience in another study examining the effects of coughing in real people.
“The main challenge is how to use particles in the water to simulate droplets in the air,” says Wang.
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