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

Turbulent intensity for pressure Outlet Boundary condition

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

Like Tree1Likes
  • 1 Post By leonardo.morita

LinkBack Thread Tools Search this Thread Display Modes
Old   April 30, 2010, 10:19
Default Turbulent intensity for pressure Outlet Boundary condition
Senior Member
Mohsin Mukhtar
Join Date: Mar 2010
Location: South Korea
Posts: 249
Rep Power: 17
Mohsin is on a distinguished road
Can anybody tell me that how can i specify the turbulent intensity at the outlet if i dont know the velocity or any other parameter at the outlet?

In my case I have a verticle cylinder from which air is coming from the top. Pressure outlet condition requires an input of turbulent intensity and hydraulic diameter. I know the hydraulic diameter but i dont know the Turbulent intensity at the outlet. How to specify that parameter as i dont know the velocity etc at the outlet.

Mohsin is offline   Reply With Quote

Old   April 30, 2010, 10:36
Leonardo Giampani Morita
Join Date: Apr 2009
Location: Paris, France
Posts: 58
Rep Power: 17
leonardo.morita is on a distinguished road
These inputs are only used in case of backflow. You can simply estimate an average velocity based on mass flow rate and diameter and then estimate the turbulent intensity. If outlet doesn't differ too much from inlet, you can even impose the same values...but rememeber that if you don't expect a backflow, this won't affect your calculations
mahditorabiasr likes this.
leonardo.morita is offline   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
Wind turbine simulation Saturn CFX 58 July 3, 2020 01:13
inlet and outlet boundary condition for turbomachinery solution siamak1424 OpenFOAM 2 August 15, 2009 11:14
setting value of turbulent intensity and turbulent viscosity ratio in wind tunnel nuimlabib Main CFD Forum 0 August 4, 2009 00:05
outlet boundary condition neil CFX 1 June 17, 2002 00:57
outlet massflow boundary condition ?? Charles Renard FLUENT 5 August 24, 2001 15:47

All times are GMT -4. The time now is 10:14.