What is the effect of leidenfrost?

Leidenfrost Effect is a physical phenomenon that occurs when the liquid is exposed to an extremely hot substance. In immediate contact with thermal evaporation and steam, the liquid creates an insulating layer that slows the evaporation and cooking rate, allowing the remaining liquid to float. The classic example is seen in the kitchen, where the chef can flick water droplets into the pan to test the temperature. If the pelvis is hot enough, it seems that the beads of the water skates across the lower part of the pan on the bed of steam, rather than evaporation immediately from the heat. The researchers watched his work in the 18th century and confirmed the findings. In the laboratory, the Leidenfrost effect is sometimes used for demonstrations and laboratory jokes; One potentially dangerous display includes immersion of wet fingers in a spa of molten lead. The water on the fingers evaporates and insulates long enough to allow the experimenter to pull them back.

PhysIka behind the effect of Leidenfrost is relatively simple. When the liquid heats up quickly due to contact with something extremely hot, it forms a layer of steam. Vapor does not do very well, so it acts as a barrier between the heat of the pelvis and the remaining liquid. The droplets may seem to slip on the surface when the steam is carried. Finally, it stems, as well as the rest of the water.

In addition to being of interest and entertainment in the laboratory, Leidenfrost also has some practical applications. For example, scientists have shown that this effect can be used for cooling mechanisms. Water droplets can be induced so that with the help of Leidenfrostov, they cause a very hot grille to the hot system.

One result of the effect of Leidenfrost is that water and other liquids can actually take longer if the conditions are too hot. Further demonstrations of Leidenfrost include playing with liquid nitrogen and other potentially dangerous materials. It is important that people in these demonstrations observe withLegal security measures because there is a narrow errors. For example, immersion of fingers in molten lead can cause serious burns if they are left too long.