CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Grid Size

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

LinkBack Thread Tools Display Modes
Old   September 27, 2005, 17:05
Default Grid Size
Posts: n/a
I am A new user in CFD fluent program , Could any one tell me how to know that the grid size created in gambit is correct to make solution converge. Did i have to run fluent or there is a guid for the correct grid size (give me reference if avaliable)
  Reply With Quote

Old   September 28, 2005, 12:46
Default Re: Grid Size
Mark Russell
Posts: n/a
I guess it is first important to recognise that convergence and accuracy are not the same thing.

And so a 'good mesh for convergence' might not be one that necessarily leads to an 'accurate prediction'.

Suggestion - undertake a few sample studies where you gather flow data under specific mesh conditions and then capture the same flow data under different mesh configurations. In the extreme you will see that the results will be/may be influenced by the mesh. i.e. a numerical intrusion. This 'mesh-dependancy' is what you need to loose.
  Reply With Quote

Old   October 1, 2005, 02:19
Default Re: Grid Size
Posts: n/a
I agree with Mark, Solution may/maynot sensitiv to the mesh. But in all descritization solution depends on mesh 1)size 2) skewness (quality) 3)distribution 4) type The selection of above said depends on the type of problem, accuracy needed, required outcome e.g. turbulent eddies if needed to capture then needs the mesh size should be small than the eddies which are going to form. so on and so..
  Reply With Quote


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
OF 1.6 | Ubuntu 9.10 (64bit) | GLIBCXX_3.4.11 not found piprus OpenFOAM Installation 22 February 25, 2010 14:43
grid size jay CD-adapco 6 September 5, 2008 05:00
Phase locked average in run time panara OpenFOAM 2 February 20, 2008 15:37
increasing grid size kcg CD-adapco 5 April 8, 2007 18:26
Grid size and combustion simulation versi Main CFD Forum 4 February 16, 2004 07:42

All times are GMT -4. The time now is 02:07.