CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Capillary Flow in FLUENT

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   January 12, 1999, 11:14
Default Capillary Flow in FLUENT
younes khamliche
Posts: n/a
Sponsored Links

I am trying to model transient capillary driven of mineral oil displacing air between two parallel plates in FLUENT. The domain is two-dimensional with the length of the plates (axial span) being 200 times the channel spacing (transverse span). The two fluids are assumed immiscible. I used pressure inlet BCs (p=0) at both the entrance and exit. I am using the VOF model to calculate the volume fractions and the wall adhesion model to specify the contact angle, also I am specifying a surface tension. Naturally, this a low Re flow(Re~1). The problem is that the interface does not move from its original position. Can anyone shed some light into this.

Thank you in advance.
  Reply With Quote
Sponsored Links

Old   January 13, 1999, 11:49
Default Re: Capillary Flow in FLUENT
Elliot Schwartz
Posts: n/a
If I am understanding your problem correctly, the flow would have to be driven by the shape of the free surface. What initial free surface shape did you set? If you do not set up a free surface with some curvature, there may not be a sufficient pressure difference to initiate flow. Check the pressure distribution on your initial condition. The interface will not move without a pressure gradient. I hope that this helps.

  Reply With Quote

Old   December 4, 2014, 05:31
New Member
Join Date: Dec 2014
Location: malaysia
Posts: 6
Rep Power: 4
nurfatinas is on a distinguished road
I'm working on similar case study. How can I set the curvature on free surface? Do you mean to set some contact angle on wall adhesion in conjunction with the surface tension model?
nurfatinas is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Capillary flow?? Jane FLUENT 0 March 1, 2009 22:52
fluent flow problem Tony FLUENT 3 December 4, 2008 10:29
mass flow rates in fluent R.Sripriya FLUENT 1 November 17, 2008 00:03
How to model suction flow in an airfoil in Fluent Davy FLUENT 4 October 23, 2006 03:56
Exaust flow in silencer using fluent ramprakash FLUENT 0 April 2, 2006 10:55

Sponsored Links

All times are GMT -4. The time now is 22:25.