|
[Sponsors] |
June 19, 2007, 05:28 |
basic of mesh refinement
|
#1 |
Guest
Posts: n/a
|
Hi!
I am consider my self as novice in this area and I would like to ask about mesh refinement. First I would like to explain steps which I have done so far : - I create my 3d model using proe and export it to icem in iges format. -I did some cleaning and assigned my parts. -I create my mesh as unstructured tetrahedral and this are the things I did while preparing my mesh : a. In Global Mesh Setup, I did not change anything. b. In mesh sizes for parts, I only assigned the individual max size for each part that I have. My understanding is the smaller the maximum size, the finer the mesh (I am not sure about this). The biggest is 8 and smallest is 0.5 c. I do nothing for surface mesh setup as well for curve mesh setup d. Last thing is I compute my mesh - After finish with computing the mesh, I choose edit mesh and activate smooth mesh globally. There I choose my smoothing iterations to be 6 and up to value 0.8 (the bigger the better isn't it?) - After applying the smooths elements globally I choose check mesh, I got no error message except for unconnected vertices. - And that will be the end of my step The problem happens when I run in fluent, my residual seems to be fluctuating and my supervisor advise me to refine my mesh, but I have no idea what to do? and how to check my mesh. Any suggestions? Thanks |
|
June 19, 2007, 06:00 |
Re: basic of mesh refinement
|
#2 |
Guest
Posts: n/a
|
I am not sure that your problems are due to mesh. If you have any problems with convergence, you can try to refine that, but probably a change of the timescale will be more appropriate.
How much you can rifine your mesh depends on your computational resources and the time you are disposed to spend to obtain a solution. Bye Alberto |
|
June 19, 2007, 07:18 |
Re: basic of mesh refinement
|
#3 |
Guest
Posts: n/a
|
Thanks for the response. What do you mean by time scale? How can I change that value?
|
|
June 19, 2007, 08:14 |
Re: basic of mesh refinement
|
#4 |
Guest
Posts: n/a
|
I don't know FLUENT in details. In CFX (this is CFX forum) the timescale is the integration time for the Navier-Stokes equations and you can change it on the solver control panel. I don't know if there is an equivalent parameter in FLUENT, but i suppose there is. Try asking to fluent users in the fluent user forum.
|
|
June 19, 2007, 12:21 |
Re: basic of mesh refinement
|
#5 |
Guest
Posts: n/a
|
Thanks, I 'll check in fluent.
Anyway is there any suggestion to refine my mesh? What about my mesh size which I've given? Is it sufficient, or is there any step that I missed during mesh generation? |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Mesh motion with Translation & Rotation | Doginal | CFX | 2 | January 12, 2014 06:21 |
[snappyHexMesh] non-smooth mesh | Svensson | OpenFOAM Meshing & Mesh Conversion | 11 | January 18, 2012 09:13 |
[snappyHexMesh] I wonder, how do I mesh a car? | MadsR | OpenFOAM Meshing & Mesh Conversion | 0 | May 2, 2011 15:39 |
Icemcfd 11: Loss of mesh from surface mesh option? | Joe | CFX | 2 | March 26, 2007 18:10 |
Mesh refinement and the errors. | Korsh Mik | CFX | 0 | January 11, 2006 07:07 |