# VOF & initial volume fraction

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

 April 26, 2006, 10:30 VOF & initial volume fraction #1 Mark Guest   Posts: n/a I am working on annular flow modelling in horizontal pipe. How can I describe initial volume fraction with UDF in a horizonta pipe? is someone can help me? Thanks already

 April 26, 2006, 16:50 Re: VOF & initial volume fraction #2 Charles Guest   Posts: n/a You may be able to get away without a UDF. A simple way to do this is to use the "Adapt Mesh - Mark" menu option to mark a part of the mesh, and then to patch the volume fraction in that part of the mesh.

 April 26, 2006, 18:18 Re: VOF & initial volume fraction #3 Raphael Guest   Posts: n/a Charles solution is possible. However, I guess you will have more difficulties. First, if the initial condition is an anluar pattern the 0 velocity will produce a liquid fall from the top part of the film at wall to the bottom part. It is the velocity which makes the filme to be in the anular pattern. May be you should start with stratified flow and start increasing the velocity and leave the anular flow be produced. Other possibility is to impose an initial condition with a high velocity which is enough to keep the annular pattern but I am not sure it is going to solve the problem.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20 xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33 colinB OpenFOAM Running, Solving & CFD 5 June 13, 2013 07:48 cheng1988sjtu OpenFOAM Bugs 14 September 18, 2011 13:46 ankgupta8um OpenFOAM Running, Solving & CFD 7 January 15, 2011 14:38

All times are GMT -4. The time now is 08:34.