CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Expressions of cylindrical velocity

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 25, 2009, 21:21
Default Expressions of cylindrical velocity
  #1
Rikio
Guest
 
Posts: n/a
Dear all,

I want to know the exact expressions of cylindrical velocity components in CFX. Generally speaking, velocity are calculated in cartesian coordinate system. Where I can find it? Thanks for any help...

Rikio
  Reply With Quote

Old   March 17, 2009, 06:47
Default
  #2
mic
New Member
 
Join Date: Mar 2009
Location: Milan, Italy
Posts: 12
Rep Power: 17
mic is on a distinguished road
Rikio,
I don't know if I exactly understand your question.
Velocities are calculated in the cartesian coordinate system and are u(=vx), v(=vy) and w(=vz).
In the cylindrical coordinate system you have: radial velocity, circumferential velocity and axial velocity. If you're using the "turbo mode" you have to initialise the components and than you can calculate the velocity cylinrical components.
On the users guide the velocities components are explained.
Hope this helps.
mic is offline   Reply With Quote

Old   March 17, 2009, 21:52
Default
  #3
Senior Member
 
Rikio
Join Date: Mar 2009
Location: SH, China
Posts: 182
Blog Entries: 1
Rep Power: 17
rikio is on a distinguished road
Send a message via Skype™ to rikio
Thank you very much, Mic.
I am sorry for the ambiguity of the question. What I want to know is the relationship between cartesian velocity components and cylindrical velocity components, i.e. how to trasfer from cartesian components to cylindrical? Maybe it is more of mathematical, but I just want to know how it works.
Thank you again...
rikio is offline   Reply With Quote

Old   March 18, 2009, 06:25
Default
  #4
mic
New Member
 
Join Date: Mar 2009
Location: Milan, Italy
Posts: 12
Rep Power: 17
mic is on a distinguished road
Hallo Rikio,
yes, it is more a mathematical issue, than a CFD one.
Have a look at:
http://en.wikipedia.org/wiki/Cylindrical_coordinates
mic is offline   Reply With Quote

Old   March 18, 2009, 21:32
Default
  #5
Senior Member
 
Rikio
Join Date: Mar 2009
Location: SH, China
Posts: 182
Blog Entries: 1
Rep Power: 17
rikio is on a distinguished road
Send a message via Skype™ to rikio
Thank you, mic,

You are very appreciated for kindly help. But the velocity components is more complicated than the coordinate transfer since they are vectors. However, I have derived the formulae. Thank you.
rikio is offline   Reply With Quote

Reply

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
Multiple floating objects CKH OpenFOAM Running, Solving & CFD 14 February 20, 2019 10:08
Plotting Radial Velocity and Tangential Velocity in CFD Post ashtonJ CFX 5 July 13, 2015 03:49
Results of CFX Simulations Sof_70_Usthb CFX 3 July 9, 2011 07:15
Neumann pressure BC and velocity field Antech Main CFD Forum 0 April 25, 2006 03:15
Cylindrical velocity components Kshitij FLUENT 1 February 10, 2006 04:58


All times are GMT -4. The time now is 19:35.