CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Coordinate transformation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 23, 2007, 21:51
Default Coordinate transformation
  #1
intern
Guest
 
Posts: n/a
I finished a 3D case using cartesian coordinate, now i need convert the outlet velocity (Vx,Vy,Vz) to cylindrical velocity-(V(axis),V(tangetial),and V(radical)). How to do that in Fluent postprocessing? Appreciate your response.

  Reply With Quote

Old   May 29, 2007, 00:32
Default Re: Coordinate transformation
  #2
Bak_Flow
Guest
 
Posts: n/a
Dear Intern,

you can use the Define -> custom field functions option to define the velocity component transformations. You have to be a bit careful though with trig functions and signs but Ihave done it sucessfully before.

Let us know if you have further trouble.

Regards,

Bak_Flow
  Reply With Quote

Old   May 29, 2007, 10:12
Default Re: Coordinate transformation
  #3
intern
Guest
 
Posts: n/a
Bak_flow, thanks for your reply. The custom fuction method may work out but its implementation on arbitrarily located surfaces will be pretty troublesome.

I found a better way on the Fluent online support website, which allow us define a local (cylindrical) coordinate at the postprocessing stage. Thus we can get the cylindrical results directly, without any further conversion.

The way to do this is as following: define -> Fluid B.C's-> Rotation-Axis origin, axis direction, reference zone, etc.

Finding the origin and axis direction are also pretty tricky. You can search the online support to find more details on this.

Again, many thanks.

  Reply With Quote

Reply

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
Coordinate Transformation Problem nooredin Main CFD Forum 0 July 14, 2010 01:34
coordinate transformation Shuo Main CFD Forum 7 May 22, 2007 08:16
Coordinate Transformation Harish Main CFD Forum 0 February 9, 2006 15:04
Coordinate transformation for NS equations CFD Learner Main CFD Forum 2 June 2, 2004 18:44
cartesian to general coordinate transformation Keith Main CFD Forum 4 February 16, 2004 20:40


All times are GMT -4. The time now is 07:38.