CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Free surface flow settubg boundary conditions and plotting velocity profiles

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

LinkBack Thread Tools Display Modes
Old   December 2, 2009, 00:13
Question Free surface flow settubg boundary conditions and plotting velocity profiles
New Member
Join Date: Nov 2009
Posts: 6
Rep Power: 8
prashanthreddyh is on a distinguished road
Fluent 6.3

1. I have doubts about setting the top boundary condition in free surface flow. I know that it is a pressure outlet boundary condition at the top but what to set for mixture, water and air. Whether is it required to select open channel flow option under multiphase tab. Please explain me in detail how to set the boundary condition at the interface between water and atmosphere.

2. I have doubts on plotting velocity profiles for water flow. I know that plotting using Solution XY plot but it is giving velocity profiles for mixture, i.e I can see velocity profile above the free surface. But I donít want velocity profile above the water surface.

3. Please help me how to plot water depth profiles in an open channel. I can create a line perpendicular to the bed or parallel to the bed but help me how to proceed from there.

Thanks in advance
Prashanth Hanmaiahgari
prashanthreddyh is offline   Reply With Quote

Old   December 2, 2009, 12:06
New Member
Join Date: Jun 2009
Posts: 21
Rep Power: 8
shoushibo is on a distinguished road
about question 3, you can define a surface whose vof is 0.5. it is often considered as interface.
shoushibo is offline   Reply With Quote

Old   October 21, 2015, 09:58
Join Date: Oct 2014
Posts: 78
Rep Power: 3
Ema40 is on a distinguished road
Dear Shoushibo,

I have followed your advise and I have defined a surface with vof=0.5. But then how can I visualize on this surface the colour map for the water depths?

Thank you
Ema40 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

All times are GMT -4. The time now is 05:27.