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Old   March 24, 2014, 04:51
Default Increase number of cells and file conversion
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I wish to ask how should I actually increase the number of cells in my mesh? I tried changing the "face and element type" feature but it doesn't work.

Another issue is my mesh is in extension of ".msh" but I cant edit it with ICEM CFD. Is there any way that I can make it editable on ICEM CFD software?

Thank you.
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Old   March 26, 2014, 08:57
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Quote:
Originally Posted by Ad.Y View Post
I wish to ask how should I actually increase the number of cells in my mesh? I tried changing the "face and element type" feature but it doesn't work.
It depends on the kind of mesh you have (hexa,tetra?)
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Old   March 26, 2014, 09:04
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Originally Posted by -mAx- View Post
It depends on the kind of mesh you have (hexa,tetra?)
Elements: Hex/Wedge
Type: Cooper

I am trying to actually refine the mesh below to more numbers of cells to perform grid independence test. I used to work on Fluent and new to Gambit. And is it possible to edit this mesh using Ansys product v14.0? Thanks.
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File Type: jpg Untitled.jpg (96.3 KB, 9 views)
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Old   March 26, 2014, 09:10
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for refining this kind of mesh,
you can perform refining on quad mesh (not source surfaces) and / or refinement on source surfaces (pave)
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Old   March 26, 2014, 09:46
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Originally Posted by -mAx- View Post
for refining this kind of mesh,
you can perform refining on quad mesh (not source surfaces) and / or refinement on source surfaces (pave)
Do you mind give me a short tutorial on how I should do it? Because I tried with the operation using mesh volume but it seems it's not working. I tried to look for some tutorial on refining mesh but failed. thanks
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Old   March 26, 2014, 09:51
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That's why I asked for the kind of mesh.
With Cooper, you won't be able to refine the mesh within Volume Mesh Panel.
You have to refine Surface Mesh.
Here are Gambit Tutorials > https://www.sharcnet.ca/Software/Gam...uide/tgtoc.htm
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Old   March 26, 2014, 10:11
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Quote:
Originally Posted by -mAx- View Post
That's why I asked for the kind of mesh.
With Cooper, you won't be able to refine the mesh within Volume Mesh Panel.
You have to refine Surface Mesh.
Here are Gambit Tutorials > https://www.sharcnet.ca/Software/Gam...uide/tgtoc.htm
But you just now mentioned that not surface mesh in previous reply? Is it surface mesh under operation of mesh?

Anyway, can I convert this gambit mesh to editable mesh used in ansys softwares such as icem cfd or built in ansys meshing?

Thanks. I will look into it.
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Old   March 26, 2014, 10:25
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*take a cube
mesh all the 6 faces with quad and element size 10
Now go and mesh the volume mesh by setting element size with 1 in Volume Mesh Panel
Your volume mesh will have elements with size 10 (not 1)

*take the same cube
mesh all the 6 faces with quad and element size 1
Now go and mesh the volume mesh by setting element size with 10 in Volume Mesh Panel
Your volume mesh will have elements with size 1 (not 10)
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Old   March 26, 2014, 10:50
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Quote:
Originally Posted by -mAx- View Post
That's why I asked for the kind of mesh.
With Cooper, you won't be able to refine the mesh within Volume Mesh Panel.
You have to refine Surface Mesh.
Here are Gambit Tutorials > https://www.sharcnet.ca/Software/Gam...uide/tgtoc.htm
Quote:
Originally Posted by -mAx- View Post
*take a cube
mesh all the 6 faces with quad and element size 10
Now go and mesh the volume mesh by setting element size with 1 in Volume Mesh Panel
Your volume mesh will have elements with size 10 (not 1)

*take the same cube
mesh all the 6 faces with quad and element size 1
Now go and mesh the volume mesh by setting element size with 10 in Volume Mesh Panel
Your volume mesh will have elements with size 1 (not 10)
This one is for meshing once? I will go try it out. If I need to refine further? Then i repeat by changing the element size?
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Old   March 27, 2014, 01:36
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Quote:
Originally Posted by Ad.Y View Post
If I need to refine further? Then i repeat by changing the element size?
yes, you have to refine surface mesh again
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Old   March 27, 2014, 02:48
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Quote:
Originally Posted by -mAx- View Post
yes, you have to refine surface mesh again
Honestly, I don't understand what should I do with your tutorial. Can you explain more in details?

However, I tried another solution (will state it below) but I faced a warning where the 2 volume meshes of fluid are not mesh and not being exported. But I can see the number of cells on the face increases. Total number of cells decreases, might be due to the volume meshes error. Can I know why?

I attached the before and after mesh plus the command for your reference as well.

Thanks.


Solution:
Refining mesh
Operation Toolpad > Mesh Command Button > Face Command Button > Delete
Face mesh:
In delete face mesh, uncheck 'remove unused lower mesh', select face by shift-clicking and click apply.

Modify Edge Meshes
Change number of division on vertical edges from 5 to 10, choose:
Operation toolpad > Mesh command button > edge command button > mesh edges
Select two vertical edges, then interval count from the box under spacing that says interval size, change the number of interval count box from 5 to 10.
Make sure 'remove old mesh' is checked under Options. This ensures that old edge meshes are erased before the new edge meshes are created.

Recreate Face Mesh
Operation Toolpad > Mesh Command button > Face command button > Mesh Faces
Shift-click on the face in Graphics window to select it. Then click apply.
Attached Images
File Type: jpg Before.jpg (95.7 KB, 6 views)
File Type: jpg After.jpg (94.5 KB, 6 views)
File Type: jpg Command.jpg (44.5 KB, 5 views)
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Old   March 27, 2014, 03:21
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you asked for tutorial, so I gave you the tutorials
maybe you wanted a tutorial from me...

From what you did: you only tried to refine in x-direction, but the cap surfaces are still meshed with same size than earlier.
From your second picture it seems that your big volume ( the one you wanted to refine) is not meshed (only surfaces are meshed)
If you want you can provide me your *.dbs file I will show you how to refine your mesh
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Old   March 27, 2014, 04:07
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Quote:
Originally Posted by -mAx- View Post
you asked for tutorial, so I gave you the tutorials
maybe you wanted a tutorial from me...

From what you did: you only tried to refine in x-direction, but the cap surfaces are still meshed with same size than earlier.
From your second picture it seems that your big volume ( the one you wanted to refine) is not meshed (only surfaces are meshed)
If you want you can provide me your *.dbs file I will show you how to refine your mesh

Sorry, I don't have the .dbs file with me right now, but I can send you the .msh here first if you wish to have a try first, I will upload the .dbs in few hours time again.

Yes please, a tutorial from you will be nice if possible. Thank you so much.

Here is the link for mesh file in ".msh" extension.
https://dl.dropboxusercontent.com/u/.../Mesh/mesh.msh
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Old   March 27, 2014, 04:09
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I prefer waiting for dbs file
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Old   March 27, 2014, 06:45
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Quote:
Originally Posted by -mAx- View Post
I prefer waiting for dbs file
Here you go. It will be nice to have personal tutorial from you on how should I refine on this mesh.

Hope to hear good news from you.

https://dl.dropboxusercontent.com/u/...ambit/Mesh.zip
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Old   March 27, 2014, 07:31
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*Surface Mesh with pave and size 0.2 (surface 1 & 6 are picked)
*Volume Mesh with size 0.2 (volume 1 is picked and automatically as hex/cooper detected
>> Total Element 10019
Untitled1.jpg

*Surface Mesh with pave and size 0.1 (surface 1 & 6 are picked)
*Volume Mesh with size 0.1 (volume 1 is picked and automatically as hex/cooper detected
>> Total Element 84194
Untitled2.jpg
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Old   March 27, 2014, 08:18
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Quote:
Originally Posted by -mAx- View Post
*Surface Mesh with pave and size 0.2 (surface 1 & 6 are picked)
*Volume Mesh with size 0.2 (volume 1 is picked and automatically as hex/cooper detected
>> Total Element 10019
Attachment 29671

*Surface Mesh with pave and size 0.1 (surface 1 & 6 are picked)
*Volume Mesh with size 0.1 (volume 1 is picked and automatically as hex/cooper detected
>> Total Element 84194
Attachment 29672

I tried by changing the surface mesh and volume with size interval of 0.2 but still failed. Below attached are what I did following your instructions.
Attached Images
File Type: jpg 1.jpg (57.1 KB, 2 views)
File Type: jpg 2.jpg (62.7 KB, 2 views)
File Type: jpg 3.jpg (33.2 KB, 1 views)
File Type: jpg 4.jpg (65.5 KB, 1 views)
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Old   March 27, 2014, 08:19
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delete ALL Mesh volumes first
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Old   March 27, 2014, 08:27
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Quote:
Originally Posted by -mAx- View Post
delete ALL Mesh volumes first
You mean delete all the fluid 2,3,4 and 5 or just fluid 5? The "remove unused lower mesh" should be checked or unchecked?
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Old   March 27, 2014, 08:30
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delete all volume mesh with lower geometry option enabled.
Then just work with fluid-5
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