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Leidenfrost droplet Demonstration of the Leidenfrost effect Leidenfrost effect of a single drop of water. The Leidenfrost effect is a physical phenomenon in which a liquid, close to a solid surface of another body that is significantly hotter than the liquid's boiling point, produces an insulating vapor layer that keeps the liquid from boiling rapidly.
English: Demonstration of the Leidenfrost effect. At the instant a heated metal ball is placed in warm (≈ 60°C) water, a layer of water vapour forms around the ball. The vapor acts as an isolator and does not allow direct contact between the heated metal ball and the significantly cooler wa
Leidenfrost droplet. The effect Leidenfrost described is a phenomenon in which a liquid, in near contact with a mass significantly hotter than its boiling point, produces an insulating vapor layer which keeps that liquid from boiling rapidly. It is most commonly seen when cooking; one sprinkles drops of water in a skillet to gauge its temperature.
This is the critical heat flux. At this point in the maximum, considerable vapor is being formed, making it difficult for the liquid to continuously wet the surface to receive heat from the surface. This causes the heat flux to reduce after this point. At extremes, film boiling commonly known as the Leidenfrost effect is observed.
Leidenfrost effect (physical phenomena) Lenard effect (physics) Lense–Thirring effect (effects of gravitation) (tests of general relativity) Leveling effect (chemistry) Levels-of-processing effect (educational psychology) (psychology) (psychological theories) Liquid Sky (effect) (lasers) (stage lighting) Little–Parks effect (condensed ...
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Liquid nitrogen's efficiency as a coolant is limited by the fact that it boils immediately on contact with a warmer object, enveloping the object in an insulating layer of nitrogen gas bubbles. This effect, known as the Leidenfrost effect, occurs when any liquid comes in contact with a surface which is significantly hotter than its boiling point.
Various mechanisms of self-propelling have been introduced and investigated, which exploited phoretic effects, [9] gradient surfaces, breaking the wetting symmetry of a droplet on a surface, [10] [11] the Leidenfrost effect, [12] [13] [14] the self-generated hydrodynamic and chemical fields originating from the geometrical confinements, [15 ...