[Gmsh] Orthogonality of unstructured quad mesh

[Feifei TONG]

Dear Christophe,

Many thanks for your quick reply. It improves the mesh quality a lot, but
not to the 'publishing quality'. I expect a symmetric pattern in the mesh
to the two symmetric lines of the domain. I understand this might be
achieved by deliberately dividing the domain into many subareas, but just
wondering if there is a smart way for this. Any suggestions would be
greatly appreciated.

Kind regards,
Feifei



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On 19 November 2014 19:17, Christophe Geuzaine <cgeuzaine at ulg.ac.be> wrote:

>
> > On 19 Nov 2014, at 08:48, Feifei TONG <tongf.fei at gmail.com> wrote:
> >
> > Dear All,
> >
> > I am working to create hybrid structured-unstructured quad mesh around
> circular cylinders, similar to this in the chain of the email, as posted by
> Rajib. But I found the orthogonality appears to be very weak. I have tried
> > Smoother Surface{'faceToBeSmoothed'} = 40;
> > but without any improvement. The geo file is attached, along with a
> snapshot of the mesh. Could anyone help? Many thanks.
> >
>
> Use the DelQuad algorithm: see attached file.
>
>
>
> > Kind regards,
> > Feifei
> >
> > On 24 June 2014 05:39, Rajib Roy <mail.rajibroy at gmail.com> wrote:
> > Hello G-Meshers,
> > I am working on to create a Hybrid Structured-Unstructured Mesh to
> simulate flow over an airfoil.
> > I've created an structured mesh on airfoil surface rest of the domain
> unstructured. (mesh snapshot attached)
> >
> > I have observed highly non orthogonal cells near to leading and trailing
> edge.
> > Is there any structured mesh solver (Hyperbolic or parabolic) in GMSH ?
> (my current version is 2.8.4).
> >
> > Any suggestion or advise in highly appreciated.
> >
> >
> > Best Regards,
> > --
> > Rajib Roy
> > University of Wyoming, WY, USA
> >
> > _______________________________________________
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> > gmsh at geuz.org
> > http://www.geuz.org/mailman/listinfo/gmsh
> >
> >
> >
> <cylinder2Gmsh.geo><snapshot2cylinders.jpg>_______________________________________________
> > gmsh mailing list
> > gmsh at geuz.org
> > http://www.geuz.org/mailman/listinfo/gmsh
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
>
>
>
>
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