Why do water drops bounce on hot surfaces?

Click For Summary
SUMMARY

The discussion centers on the Leidenfrost effect, which explains why water droplets bounce on extremely hot metal surfaces instead of evaporating immediately. When a water droplet contacts a surface significantly above its boiling point, a vapor layer forms beneath it, allowing the droplet to hover and bounce. This phenomenon is a fascinating demonstration of thermodynamics and fluid dynamics in action.

PREREQUISITES
  • Understanding of thermodynamics principles
  • Basic knowledge of fluid dynamics
  • Familiarity with boiling point concepts
  • Awareness of heat transfer mechanisms
NEXT STEPS
  • Research the Leidenfrost effect in detail
  • Explore applications of the Leidenfrost effect in cooking and engineering
  • Study the principles of heat transfer and phase changes
  • Investigate experiments demonstrating the Leidenfrost effect
USEFUL FOR

Students of physics, engineers, culinary professionals, and anyone interested in the principles of heat transfer and fluid behavior.

Edi
Messages
176
Reaction score
1
There are situations when a water drop falls on a really hot metal surface and, instead of evaporating, it kinda bounces on the surface. Why?
 
Physics news on Phys.org
Google "Leidenfrost effect"
 
Exelent! Thank you. So simple. :)
 

Similar threads

High School Why Do Objects Bounce? Exploring Momentum and Energy Conservation
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Surface Tension - Using hot soapy water to wash clothes
  • · Replies 1 ·
Replies
1
Views
2K
High School Moist air - does it rise or drop?
  • · Replies 42 ·
2
Replies
42
Views
13K
High School Why Did My Tennis Serve Bounce Unusually Low?
  • · Replies 15 ·
Replies
15
Views
2K
High School Why did the water drops bounce instead of vaporizing on the hot cooker?
  • · Replies 1 ·
Replies
1
Views
1K
High School Why do objects break? (in the case of a body at rest on a surface)
  • · Replies 2 ·
Replies
2
Views
2K
High School How to characterize a rubber ball moving horizontally and bouncing off of a vertical wall?
  • · Replies 8 ·
Replies
8
Views
2K
High School Why do stones bounce off the water?
  • · Replies 2 ·
Replies
2
Views
4K
High School Energy changes that result when something drops from a height
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Fragmentation of a drop in a miscible fluid
  • · Replies 2 ·
Replies
2
Views
1K