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The fog has been named the most effective means against fires

Russian researchers have shown that the use of microdroplets of water to extinguish fires is by three and more times more effective than conventional methods. The discovery can greatly simplify the extinguishing of large forest fires. The corresponding article is published in the International Journal of Heat and Mass Transfer.
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The authors of the new work took samples of parts of woody plants (branches with ordinary or acerose leaves) and dried them for a week under stable temperature and humidity conditions. Then the scientists set them on fire (in a laboratory) and then extinguished the fire with water spray nozzles, widely available in various shops. Researchers managed to find out that when a droplet size is between 50 and 500 micrometres, combustion stops so quickly that there is no need for a considerable amount of water to extinguish the fire. The usual amount of water required to extinguish a forest fire is 3−5 litres per square metre, but during the experiment the fire was extinguished with less than one litre per square metre, down to just 0.65 litres m2, in some of experiments.

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