CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Problem with VOF open channel modelling

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 13, 2006, 07:51
Default Problem with VOF open channel modelling
Biswanath Mahato
Posts: n/a
Hi all,

I am a graduate student from Bengal Engineering and Science University, W.B., India currently working with Fluent 6.2 in trying to model vegetated open channels. In this regard I am facing some problem related to open channel boundary conditions in VOF model in Fluent.

My questions are 1) How to specify different boundary conditions in open channel simulations? 2) Is it appropriate to select two phase model in case of open channel(if so then how to specify air and water inlet BC saperately)? 3) If i select only one phase(i.e., water) what should be outlet boundary condition (as in case of open channel outlet pressure will not be atmospheric pressure, then what should be it's boundary condition)?

I request you to provide your valuable suggestion on what boundary conditions are appropriate at the inlet, outlet and upper surface in Fluent. I am currently using two phase model (air phase at the upper portion and water phase at lower portion).

waiting for your response.

Biswanath Mahato

  Reply With Quote

Old   September 14, 2006, 04:20
Default Re: Problem with VOF open channel modelling
Posts: n/a
hi Mahato

use two inlets, top one for air and botom one for water. in operating conditions make sure teh pressure acts in the air inlet region. i suggest u use water as primary phase, for top inlet conditions specify primary phase (water if u select water as primary) volume fraction as 0 and for botom intet conditions use secondory phase (air) as 0. have a single outlet and bc can be pr.outlet or simply outlet. i hope my suggesion is helpful. Regards Rizwan.
  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
pisoFoam compiling error with OF 1.7.1 on MAC OSX Greg Givogue OpenFOAM Programming & Development 3 March 4, 2011 17:18
Version 15 on Mac OS X gschaider OpenFOAM Installation 113 December 2, 2009 10:23
How did I give a triangular curve (open channel problem) ? Andy Chen FLUENT 0 June 22, 2009 00:13
Backflow in Open Channel VOF simulations Kalous FLUENT 0 February 6, 2008 08:02
Open Channel Boundary Conditions via journal Matteo FLUENT 0 January 21, 2008 11:05

All times are GMT -4. The time now is 02:30.