[Gmsh] High-Order Curved Boundary Layer Mesh

[Christophe Geuzaine]

Hi Nico,

Indeed, the "old" experimental boundary layer code is really a hack: the parametric coordinates of the points are not correct; hence the failure when trying to generate high-order grids.

This is in the process of being done in the "correct way". Stay tuned... :-)

Christophe

On 22 Jan 2013, at 11:15, Nico Schlömer <nico.schloemer at gmail.com> wrote:

> I've got a similar unwanted behavior when using a circle of which the interior is also meshed; see attachment.
> 
> Hints are appreciated.
> 
> --Nico
> 
> 
> On Mon, Jan 21, 2013 at 9:28 PM, Vincent, Peter E <p.vincent at imperial.ac.uk> wrote:
> Dear All,
> 
> I am trying to create a 2D mesh around a circle. I would like a boundary layer mesh of quadrilateral elements adjacent to the circle, and then an unstructured triangular mesh elsewhere in the domain.
> 
> I have made the attached .geo file, which seems to work fine for linear elements. However, when I switch up to 2nd or 3rd order curved elements I run into problems (see attached images).
> 
> Does anyone have any idea what I have done wrong.
> 
> I am using the following version of Gmsh:
> 
> Info    : Gmsh version   : 2.6.2-svn
> Info    : Build OS       : MacOSX
> Info    : Build options  : 64Bit Ann Bamg Bfgs Blas(VecLib) Blossom Chaco DIntegration Dlopen Fltk Gmm Jpeg(Fltk) Lapack(VecLib) MathEx Med Mesh Metis Mmg3d Mpeg NativeFileChooser Netgen OneLab OneLabMetamodel OpenCascade OpenGL OptHom PETSc Parser Plugins Png(Fltk) Post RTree SLEPc Salome Solver Tetgen(1.5) Voro3D Zlib
> Info    : Build date     : 20130118
> Info    : Build host     : Christophes-Mac.local
> Info    : Packager       : geuzaine
> 
> Cheers
> 
> Peter
> 
> <1st_Order.png>
> <1st_Order_Zoom.png>
> <2nd_Order.png>
> <2nd_Order_Zoom.png>
> 
> 
> 
> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine