[Gmsh] Spacing of boundary layer cells

[Christophe Geuzaine]

> On 10 Oct 2018, at 12:16, Nathan RICKS <Nathan.James.Ricks at vub.be> wrote:
> 
> Hi Gmsh users/developers,
> 
> I'm working on a simple 2D airfoil mesh (coarse geo file attached) - I would like the boundary layer to not have a uniform discretization along the airfoil surface. I would like "wider" cells mid chord, and "narrower" cells near the leading and trailing edges. From what I can work out, the boundary layer cell width is only defined by the characteristic length given at the first point of the curve?

You can use all the usual tools to define mesh sizes along the profile - cf. e.g. tutorial/t10.geo

> 
> ie. hypothetical boundary layer cell "width" on a curve shown below: 
> leading                   mid                     trailing
> |-|-|--|--|--|----|----|----|----|--|--|--|-|-|
> 
> Is there a way to enforce this?
> 
> Thank you in advance,
> Kind Regards,
> 
> 
> 
> 
> Nathan Ricks | PhD Student
> 
> Department of Mechanical Engineering
> Thermo and Fluid dynamics (FLOW)
> 
> Brussels Faculty of Engineering (BRUFACE)
> Vrije Universiteit Brussel (VUB)
> 
> 
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

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