[Gmsh] Small dimension objects from CAD software - mesh generation problem

[Jean-François Remacle]

Le 18 mars 2013 à 18:25, Matija Mraovic <matija.mraovic at guest.arnes.si> a écrit :

> Hi,
> 
>  
> There are two files:
> 
> -plane.geo is just a definition file included in extruded.geo
> 
> -extruded.geo is the 3d geometry i would like to mesh.
> 
>  
> The "extruded.geo" file is the right one, "plane.geo" is just a planar geometry, which i am then extruding to
> 
> certain z-value (height) in extruded.geo. It seems to me you were making 2d mesh, i'm trying to make 3d (extruded.geo).
> 
>  
> The plane under the electrodes is substrate (plastic, foil...) on which electrodes are actually printed. I want to calculate
> 
> how the capacity of capacitor changes when substrate is changed. So basically it should be as near as possible to electrodes,
> 
> but not on the same plane as electrodes. Now, I have placed it at -1e-6 on z-axis and electrodes are at 0.0. Then I extrude
> 
> electrodes up to 0.01mm, and substrate down to -0.06mm. I also extrude the large bottom plane so it forms a big cube - this is the
> 
> surrounding air.
> 

The 3D geometry is incorrect.  The volume is not closed. Here is a correct version of it.

Note that the mesh sizes you define produce a 3D mesh of about 9 million elements…

JFR


 




>  
> Thank you!
> 
> BR
> 
> mm
> 
>  
> 18.03.2013 17:15, je Jean-François Remacle napisal
> 
>> Hi,
>> I do not know if it is really wanted, but your mesh size cl3 is very small, which makes
>> the plane under the electrodes extremely finely meshed. I have changed it ti 1 mm.
>> Second, the plane that is drawn on the electrodes is the same as the one where the electrodes are. 
>> Is it normal ? If not, I have created 3 surfaces and this is what I get
>> <isitok2.png><isitok.png>
>>  
>> 
>> Le 18 mars 2013 à 11:02, Matija Mraovic <matija.mraovic at guest.arnes.si> a écrit :
>> 
>> ------------------------------------------------------------------
>> Prof. Jean-Francois Remacle
>> Universite catholique de Louvain (UCL)
>> Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering
>> Institute of Mechanics, Materials and Civil Engineering (iMMC)
>> Center for Systems Engineering and Applied Mechanics (CESAME)
>> Tel : +32-10-472352 -- Mobile : +32-473-909930 
>> 
>>  
>> 
>  
>  
> _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh

------------------------------------------------------------------
Prof. Jean-Francois Remacle
Universite catholique de Louvain (UCL)
Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering
Institute of Mechanics, Materials and Civil Engineering (iMMC)
Center for Systems Engineering and Applied Mechanics (CESAME)
Tel : +32-10-472352 -- Mobile : +32-473-909930 

 





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20130319/5d000041/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: extrudedb.png
Type: image/png
Size: 249844 bytes
Desc: not available
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20130319/5d000041/attachment.png>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20130319/5d000041/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: extrudedb.geo
Type: application/octet-stream
Size: 24883 bytes
Desc: not available
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20130319/5d000041/attachment.geo>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20130319/5d000041/attachment-0002.html>