Work done in capillary action

  • Thread starter AudioFlux
  • Start date
  • #1
58
0

Main Question or Discussion Point

This question struck me when i was watching a liquid rise in a capillary tube. I'm curious to know from where the energy gets transferred to the liquid to rise above the surface. Well, one possible explanation that i can think of is air pressure. Though, it can be a possible reason only if the other end is closed (i don't remember if it was open or closed). So am i on the right track?
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
25,832
249
Hi AudioFlux! :smile:
I'm curious to know from where the energy gets transferred to the liquid to rise above the surface. Well, one possible explanation that i can think of is air pressure.
No, it's surface tension, see …

http://en.wikipedia.org/wiki/Capillary_action#Height_of_a_meniscus
http://en.wikipedia.org/wiki/Wetting
http://en.wikipedia.org/wiki/Contact_angle :wink:

(if the contact angle is greater than 90°, the solid surface is hydrophobic, and the liquid will fall

this is how those damp-proofing injections work, they line the capillaries in the bricks with a hydrophobic lining)
 
Last edited:

Related Threads for: Work done in capillary action

  • Last Post
Replies
5
Views
709
Replies
2
Views
10K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
7
Views
4K
Replies
3
Views
34K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
2
Views
6K
  • Last Post
Replies
1
Views
1K
Top