Capillary Rise in Tubes with Sharp Grooves

Details Capillary Rise in Tubes with Sharp Grooves Capillary Rise in Tubes with Sharp Grooves

1994-01-17

arxiv.org/abs/cond-mat/9401031v1

Physics

Condensed Matter

12 pages, figs. 1 and 2 are appended to the file in postscript, figs. 3 and 4 are available from author, e-mail: tang@thp.uni-

Scientific paper

10.1051/jp2:1994172

Liquid in grooved capillaries, made by e.g. inserting a plate in a cylindrical tube, exhibits unusual spreading and flow properties. One example is capillary rise, where a long, upward tongue on top of the usual meniscus has been observed along the groove. We attribute the underlying mechanism to a thermodynamic instability against spreading for a (partial or complete wetting) liquid in a sharp groove whose opening angle $\alpha$ is less than a critical value $\alpha_c=\pi-2\theta$. The equilibrium shape of the tongue is determined analytically. The dynamics of liquid rising is studied in the viscous regime. When the diameter of the tube is smaller than the capillary length, the center part of the meniscus rises with time $t$ following a $t^{1/2}$-law, while the tongue is truncated at a height which grows following a $t^{1/3}$-law. Sharp groove also facilitates release of gas bubbles trapped inside a capillary under the action of gravity.

Affiliated with

Also associated with

No associations

Rating

Capillary Rise in Tubes with Sharp Grooves does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Capillary Rise in Tubes with Sharp Grooves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capillary Rise in Tubes with Sharp Grooves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-575599