[Gmsh] Orthogonality of unstructured quad mesh

[Christophe Geuzaine]

> 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.

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> 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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> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine