Health
Wearing a mask outdoors can reduce the risk of catching a Covid or a cold
It is well established that it costs money to wear mask Among the indoor crowds.
Now, scientists say it makes sense to wear it in a crowded outdoor setting, especially when it’s blown away a bit.
Researchers have found that when a person coughs outdoors, the wind flows in the same direction. Can promote Covid-19, colds and other viruses It will be faster over longer distances than in calm conditions.
“This study is important in that it points to an increased risk of infection that can be caused by a cough in the same direction as the wind...
“Based on the results, we recommend wearing a mask outdoors, especially in refreshing conditions,” said Amit Agrawar of the Indian Institute of Technology Bombay.
“Overall, this study emphasizes the high likelihood of infection even in the presence of breeze,” he added.
In the simulation of this study, even a breeze of about 5 mph, depending on the intensity of the cough, required about 20 percent of the distance needed to extend an effective social distance from 3 feet-6 feet to 3.6 feet-7.2 feet. Shows growth. On the other hand, from 9mph to 11mph, the spread of the virus increases by more than one-third.
Other guidelines, such as coughing your elbows or turning your face while coughing, should also be followed to reduce infections when socializing outdoors.
Most studies have modeled cough flow using a blow of air or a simple pulsation profile. However, the actual cough is more complex and exhibits turbulence with a pronounced whirlpool structure that swirls like a small whirlpool.
To investigate these eddies, researchers used large eddy simulation, a numerical model of computational fluid dynamics that simulates turbulence.
They modeled a cough jet in refreshing and mild conditions, representing a typical indoor environment.
The study is published in the journal Fluid physics..
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