[Gmsh] unstructured periodic surface

[Christophe Geuzaine]

Hi Justin,

See e.g. https://gitlab.onelab.info/gmsh/gmsh/blob/master/demos/boolean/periodic.geo

Christophe

> On 18 Jul 2019, at 17:20, Junting Chen <chen112p at uwindsor.ca> wrote:
> 
> Hello all, this might be answered previously but i wasn't really able to find a good solution yet. 
> 
> I have created a bounding box and extracted my target geometry out by the boolean operation. The next step I want to do is to force the two side planes having the same mesh. I think I should use the periodic command but i can never make it work properly.
> 
> Periodic Line{5} = {21} ;
> Periodic Line{1} = {3} ;
> Periodic Line{7} = {24} ;
> Periodic Line{6} = {23} ;
> Periodic Surface {5}= {6};
> 
> I kept on getting error message like "Affine transformation requires at least 12 entries". 
> 
> I have attached my .geo file as well as the step file if anyone doesn't mind to do a brief run. 
> 
> Thanks a lot for your help!
> 
> Junting Chen
> <concaveTower.geo><concaveTower.stp>_______________________________________________
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine