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

why axisymmetric model space="grid check failed"?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 26, 2006, 05:01
Default why axisymmetric model space="grid check failed"?
  #1
anwar
Guest
 
Posts: n/a
hi all.i'm fluent new user.i have task to analized a 2D model with a TEE form using space model solver axisymmetric.the problem is when i checking the grid it's written "grid check failed".anyone can help me?
  Reply With Quote

Old   June 26, 2006, 08:36
Default Re: why axisymmetric model space="grid check faile
  #2
Jason
Guest
 
Posts: n/a
Most common reason is that you have mesh below the X axis (X Axis MUST be the axis of rotation).

Hope this helps, and good luck, Jason
  Reply With Quote

Old   June 26, 2006, 10:09
Default Re: why axisymmetric model space="grid check faile
  #3
Cyril
Guest
 
Posts: n/a
...or you didn't set your axis as an "axis" in the boundary conditions form (gambit)... (It hapened to me...)
  Reply With Quote

Old   June 26, 2006, 23:10
Default Re: why axisymmetric model space="grid check faile
  #4
anwar
Guest
 
Posts: n/a
how to defined X axis as the axis of rotation?is it in Gambit or fluent?thanks a lot before Anwar
  Reply With Quote

Old   June 27, 2006, 08:55
Default Re: why axisymmetric model space="grid check faile
  #5
Jason
Guest
 
Posts: n/a
In the 2D axisymmetric model, the X axis is the axis of rotation no matter what. You don't have to set it, but you can't change it either. So in Gambit (or whatever program you used to create your mesh) you have to make sure that you model your geometry so that the X axis is coincident with your axis of rotation. What Cyril was talking about is for like the centerline of a pipe (where Fluid touches the axis of rotation). You need to define this as an "axis" boundary condition. You should do this in Gambit when you're defining your other BCs. Also, your geometry has to all lie above the X axis (so your geometry must like where y>=0).

Hope this helps, and good luck, Jason
  Reply With Quote

Old   June 27, 2006, 11:38
Default Re: why axisymmetric model space="grid check faile
  #6
chris
Guest
 
Posts: n/a
You could define it in Gambit, or change the boudary conditon in FLuent. All should work. Hope it helps.
  Reply With Quote

Old   June 27, 2006, 18:50
Default okay what about axis of annulus
  #7
shashikant
Guest
 
Posts: n/a
what if the geometry is annulus and in 2D it is a rectangle placed at a distance away from x-axis there is no real or virtual edge ant y=0 line to be labled as axis .. hope you got my problem.. how do we define the axis now ???

shashikant

  Reply With Quote

Old   July 8, 2006, 09:30
Default Re: why axisymmetric model space="grid check faile
  #8
Getachew
Guest
 
Posts: n/a
-make the axis is parallel to the x-axis. -check the skewness of your grid. Try by changing meshing tyes.
  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
Transient boundary conditions Jarrod Sinclair (Sinclair) OpenFOAM Running, Solving & CFD 132 November 30, 2011 12:06
HELP! grid check failed in parallel fluent restart FLUENT 0 March 5, 2011 10:55
Problems in compiling paraview in Suse 10.3 platform chiven OpenFOAM Installation 3 December 1, 2009 08:21
Axisymmetric model Satish Perivilli FLUENT 2 May 9, 2006 11:02
K-Epsilon Model for Axisymmetric Domain Valdemir G. Ferreira Main CFD Forum 1 May 27, 2000 14:03


All times are GMT -4. The time now is 01:48.