Are they telling us in this article how the pyramids really were built?
- This is because of something known as the ‘Leidenfrost Effect’
- The effect causes the water to levitate on the evaporated gas vapour
- Movement can be changed by adjusting the surface texture and temperature
If you’ve ever spilt water on a hot pan, you’ve seen the Leidenfrost Effect in action.
The skittering and fizzing that takes place happens because the surface is super-hot- about twice as hot as the liquid’s boiling point.
This causes the water to levitate on the evaporated gas vapour which acts a barrier that keeps the droplet and the hot surface separated.
The skittering of water occurs because a surface is about twice as hot as the liquid’s boiling point. This causes the water to levitate on the evaporated gas vapour which acts a barrier that keeps the droplet and the hot surface separated
THE LEIDENFROST EFFECT
When a liquid hits something really hot – about twice as hot as the liquid’s boiling point – it never comes directly in contact with its surface.
This is because vapour acts as a barrier that keeps the two separated. The skittering of water you see when it hits a hot pan is the Leidenfrost effect.
Bath University’s Alex Grounds and Richard Still looked at how droplets travel on different textured surfaces, heated at varying temperatures.
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