[Gmsh] create the coarsest 3d hexahedra mesh

[Denis Davydov]

Dear Roman,

Thanks for your advice. 
I actually came across the 
Transfinite Line/Surface/Volume settings (also structured mesh). 
Using this, i was able to make a simple hex mesh. 

The only small (not a deal breaker) peculiar behavior is that 
even though i set 2 nodes per line, when the 3D mesh is applied, 
an additional node is introduced in the middle of each line. Thus, 
say, cube is divided into 8 hexa  instead of 1. 
Apart from that things look as expected.


Kind regards,
Denis.

On 27.03.2013, at 21:55, Roman Putanowicz <putanowr at l5.pk.edu.pl> wrote:

>> Dear all,
>> 
>> I just started trying to use Gmsh software.
>> What I need is a coarsest (for current test almost no refinement) mesh
>> based on few cuboids. In other words, i want nodes = points (roughly),
>> The restriction is that i need ONLY hexahedra elements (or quads in 2d).
> Dear Denis,
> 
> With geometry so simple and the requirements for pure hexahedral mesh
> I would generate structured mesh. If you need unstructured one then
> you can "shake" the mesh moving the nodes a little randomly.
> You can make your structured mesh by using extrusions, for instance
> see this example:
> http://www.l5.pk.edu.pl/~putanowr/dokuwiki/doku.php?id=en:projects:meshtools:gmsh:extrusions
> 
> 
> Regards,
> 
> Roman