[Gmsh] Quadrangular mesh with flat faces from ruled surface

[Christophe Geuzaine]

> On 12 Feb 2019, at 23:56, Nilanka Ekanayake <nilankae20 at gmail.com> wrote:
> 
> Hi
> 
> I have the same problem. I am creating a sphere which use Rules Surface + Transfinite Algorithm. Even though I set the Mesh.ElementOrder = 1; Still I get some curvatures in the quads. 
> 

First order quads can indeed be non-planar (the basis functions are bilinear). Can you send the geometry you'd like to mesh?


> I need flat quad mesh surfaces that are created from Ruled Surface Options. Any help would be great!
> 
> Thanks,
> Nilanka.
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine