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

Need help with Grid Adaption

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 13, 2005, 08:07
Default Need help with Grid Adaption
  #1
_stephen_
Guest
 
Posts: n/a
Good day,

I am modelling a room (10m x 5m x 5m) with air entering the domain through 6 15mm x 8000mm louvres in the ceiling at an angle of 45. I mesh the room in gambit as good as possible but due to the big variations in scale the simulation results (especially the velocity in the domain) are unsatisfactory. Therefore I want to adapt the grid in Fluent and encountered several problems:

1) under what circumstances is the y+/y- Adaption Panel available - I tried quad and tetra cells; before and after iterations; sometimes the menu item is disabled

2) is it possible to coarsen 3d cells in Fluent at all? according to the manual (23.8.3) not really: "Note that if you are using hanging node adaption (the default), you will not be able to create a grid that is coarser than the original grid. For this, you must use conformal adaption. Note also that conformal coarsening is only available for 2D or axisymmetric geometries."

3) when I refine the grid with a y*/y+ adaption, the min and max values of y before and after refinement do not change, but several cells are reported to be refined

Any help would be greatly appreciated

Thank you -Stephen-
  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
grid adaption mode NOT selectable via VNC Ralf Schmidt FLUENT 2 May 24, 2006 02:35
On Gradient Grid Adaption David FLUENT 2 May 2, 2005 15:50
Adaption by Y+ on a mixed grid with periodics Martin Shanel FLUENT 0 June 24, 2002 06:31
Combustion Convergence problems Art Stretton Phoenics 5 April 2, 2002 05:59
Grid Adaption problems Jie FLUENT 1 February 26, 2002 12:03


All times are GMT -4. The time now is 04:42.