CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM

Radial and Tangential Velocity boundary conditions

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

LinkBack Thread Tools Display Modes
Old   August 17, 2010, 12:02
Default Radial and Tangential Velocity boundary conditions
N. A.
Join Date: May 2010
Posts: 64
Rep Power: 9
N. A. is on a distinguished road
Hi Folks,

I have four circular inlets in a cylindrical geometry that gives out inflow at an angle. I am trying to find if there is a way to speificy radial and tangential componets of the velocity and give it as a boundary conditions.
I understand that the normal way of giving is in cartesion approach in (Ux,Uy,Uz) and I am wondering if tehre is a way to give in cylindrical coordinates, viz., (Ur,Ut,Uz) boundary conditions.

N. A. is offline   Reply With Quote

Old   September 16, 2010, 10:48
Senior Member
Join Date: Sep 2010
Location: France
Posts: 225
Rep Power: 10
T.D. is on a distinguished road
oh i have the same problem, and no body answered me a clear answer uptill now
i hope that we will get a quick answer
T.D. is offline   Reply With Quote

Old   December 5, 2010, 14:22
Default Tangential & Axial Velocity Profile
New Member
Join Date: Jun 2010
Posts: 14
Rep Power: 9
robyn is on a distinguished road
Do either of you know how to convert from Ux,y,z to tangential and axial velocity's? I am working on a cyclone geometry and would like to convert my results.
robyn is offline   Reply With Quote

Old   September 2, 2011, 06:38
Default Tangential velocity from cartesian components
New Member
Sujeet Kumar Shukla
Join Date: Sep 2011
Posts: 1
Rep Power: 0
skshukla2000 is on a distinguished road
I would like to also know how to transform Cartesian velocity components of Fluent (i.e. Ux, Uy and Uz) into cylindrical components (i.e. axial, tangential and radial)
skshukla2000 is offline   Reply With Quote

Old   September 2, 2011, 07:21
Senior Member
Join Date: Sep 2009
Location: Delft
Posts: 790
Rep Power: 15
Bernhard is on a distinguished road
That can be achieved by an easy space-dependent matrix multiplication. You have to look it up in your favorite linear algebra book how it is done.
Bernhard 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Regarding the boundary conditions for blower nagababug STAR-CCM+ 0 May 18, 2010 02:29
Cyclone Tangential Velocity ... Abdul FLUENT 2 August 13, 2008 00:07
Axial, Radial, Tangental velocity in FLUENT post Barri FLUENT 2 March 6, 2008 21:29
vectors in radial, tangential and axial direction mateus FLUENT 1 April 11, 2006 05:57
Radial and tangential velocity Antonio Mileo FLUENT 2 February 16, 2001 02:41

All times are GMT -4. The time now is 16:46.