1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Capillary Flow in a Tube

  1. Nov 30, 2016 #1
    I'm trying to understand capillary flow in a tube. I've found this website that explains some aspects of it, the system is illustrated here,


    So the (black) non-wetting fluid resides to the left and the (white) wetting fluid is to the right. Say that we are looking at a pore in a piece of chalk/rock and that the outlet (to the right) is a big reservoir of wetting fluid, whereas the inlet to the left is merely the end of the pore. Given this setup, I can't quite figure out how the inlet pressure pL relates to the outlet pressure pR.

    They can't be equal since the capillary forces must introduce a pressure gradient which "pushes" the non-wetting phase out, given that the solid boundary is wetting. Given this, I would anticipate that pR<pL.

    Is this reasoning correct?
    Last edited: Nov 30, 2016
  2. jcsd
  3. Dec 5, 2016 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Capillary Flow Tube Date
I The difference between capillary number and Laplace number? Oct 10, 2016
Capillary Rise In Tube Feb 9, 2015
Gas flow through a capillary Jun 23, 2010