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

CFX 4.4 coordinate problem!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 23, 2003, 10:48
Default CFX 4.4 coordinate problem!
  #1
hx
Guest
 
Posts: n/a
Hello, everyone,

I am using CFX4.4 to simulate a reactor. I use the Cartesian coordinate in thr pre-process, and analyse with Cylindrical coordinate. I use the post process to analyse the rusult. I do not konw the U V W value is the for the Cylindrical coordinate or for the Cartesian coordinate. I need the urgent help!
  Reply With Quote

Old   December 23, 2003, 10:50
Default Re: CFX 4.4 coordinate problem!
  #2
hx
Guest
 
Posts: n/a
  Reply With Quote

Old   December 25, 2003, 03:09
Default Re: CFX 4.4 coordinate problem!
  #3
Jeff
Guest
 
Posts: n/a
If the problem was solved in cylindrical coordinates (CYLINDRICAL option on) then U is the axial, V is the radial, and W is the azmuthal velocity.

Note that to do this, you have to transform the mesh into cylindrical coordinates (slab=wedge), but it sounds like you've gotten that far already.

Jeff
  Reply With Quote

Old   December 25, 2003, 07:14
Default Re: CFX 4.4 coordinate problem!
  #4
Anne
Guest
 
Posts: n/a
Hi Jeff, Probably my CFX4.4 memory is a bit rusted now. Are you saying that to use the CYLINDRICAL cordinates you must have the SLAB=WEDGE OPTION? I thought you need to use that option only if it is a cylindrical 2D, which strictly speeking is a 3D with one coordinate with only one cell.

Regards Anne.
  Reply With Quote

Old   December 26, 2003, 05:31
Default Re: CFX 4.4 coordinate problem!
  #5
hx
Guest
 
Posts: n/a
Hi, Jeff,

Thank a lot for your quick and good response.My simulation is solved in cylindrical coordinate. When I open the post-processor, the coordinate displayed is still Cylindrical coordinate. I was a little confused. Redards Hx
  Reply With Quote

Old   December 27, 2003, 14:58
Default Re: CFX 4.4 coordinate problem!
  #6
Jeff
Guest
 
Posts: n/a
Yes, that's true.

My CFX4.4 memory is also "unexercised".

I also believe there's a conversion to x-r-Theta in the Build analysis form which converts xyz to said coordinate system if it's built in 3D. You have to watch though, not to cross the theta=pi plane (conversion fails due to atan function).

Velocities in post processor are still maintained in axial, radial and theta components as long as the CYLINDRICAL option is set in the solver.

Jeff
  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
sliding mesh problem in CFX Saima CFX 45 September 22, 2015 10:53
Problem in coupling CFX and Ansys for fluid-thermal sim. Jordi CFX 15 June 6, 2015 00:45
CFX Casting problem: Can it be done all in one? jfasl CFX 1 September 14, 2010 03:14
CFX pressure in Simulations problem nasdak CFX 1 April 14, 2010 13:22
CFX 4.4 installation problem Pandu Sattvika CFX 1 December 1, 2001 05:07


All times are GMT -4. The time now is 18:36.