[Gmsh] building 3D mesh from 2D surfaces

[RENARD Francois]

Great, it works fine, thank you very much !

François

Le 18/08/2015 15:21, David Colignon a écrit :
>
> On 18/08/15 08:58, RENARD Francois wrote:
>
>> Dear all,
>>
>> I'm trying to use GMSH to mesh a 3D volume defined by two (irregular) 
>> surfaces (for examples the substratum of an aquifer at the
>> bottom and the topographic level at the top).
>>
>> I'd like to know how it's possible with GMSH.
>>
>> I tried to mesh first the two surfaces and to ask GMSH to mesh the 
>> volume but I get always poor results with lot of warnings :
>>
>> Warning : Could not orient normal of surface 10
>> Warning : Could not orient normal of surface 12
>> Warning : Could not orient normal of surface 13 ... (see attachment.log)
>>
>> I've tryed the very simple joined geometry (attachment.geo) , with 
>> two plane surfaces joined by lines, but the 3D mesh result is
>> awful.
>>
>> I don't understand what can be wrong and would be interested in 
>> having some help to resolve this problem.
>> The goal is to deal with more complex (no plane) surfaces...
>>
>> Thank you,
>>
>> François
>
> Dear François,
>
> just add the
>
> Coherence;
>
> command at the end of your .geo file.
>
> It will remove the duplicates lines you have each time triangles share 
> a common edge.
>
> Regards,
>
> Dave
>