CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

Free Flow Boundary Condition

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 1, 2014, 13:00
Default Free Flow Boundary Condition
  #1
New Member
 
Shabir Mohamed
Join Date: Jun 2014
Posts: 20
Rep Power: 4
Shabirmean is on a distinguished road
Hi,

I am using the shallowWaterFoam solver to study height and speed variation of the water at different depth levels. As for the example case given in the OpenFOAM installation the boundary condition at the outLet is set as "zeroGradient" for U(Velocity) and hTotal(Height).

Does this boundary condition mean that the Water Waves reaching this (outLet) boundary bounces back into the same simulation area adding to the Velocity and hTotal at the grid cells within???

Or else is the fluid flow that reaches the boundary is freely flowing outside of it without any reflected waves?

I am looking for at a case of the second type where all the water waves that reach the end ("outLet") are freely flowing outside of the simulation area without bouncing back in.

How do I set the boundary condition for this? I see that the sides of this case are set to a boundary condition called "slip". Should I use this???

Please Help!!!!
Shabirmean is offline   Reply With Quote

Reply

Tags
boundaries condition, free flow, outlet boundary

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
Issues on the simulation of high-speed compressible flow within turbomachinery dowlee OpenFOAM Running, Solving & CFD 8 October 25, 2016 19:48
What is the meaning of stress free boundary condition? kmgraju CFX 6 March 10, 2016 18:17
Volume flow rate boundary condition in OpenFOAM mayank.dce2k7 OpenFOAM Running, Solving & CFD 13 August 11, 2014 20:16
Flow diode boundary condition olauer STAR-CCM+ 5 July 16, 2013 10:05
An error has occurred in cfx5solve: volo87 CFX 5 June 14, 2013 17:44


All times are GMT -4. The time now is 21:46.