[Gmsh] gmsh 4.5.6: Creating a mesh from .vtk files - Surface is not remeshing but only the Volume

[Lisa Pankewitz]

Dear Christophe,

thanks so much for your helpful and fast response. It is really appreciated!

Just to double check: Does that mean that the assignment of surface names
with the syntax I used before does not work any longer in gmsh ?

Thanks so much and have a great day :)
Kind regards,

Lisa

----------------------------------------------------------------------------------------------------------------------
*Lisa Pankewitz*
PhD student
Simula Research Laboratory
Martin Linges vei 25
1364 Fornebu
Office 329
lisa at simula.no



On Mon, 22 Jun 2020 at 18:10, Christophe Geuzaine <cgeuzaine at uliege.be>
wrote:

> Hi Lisa,
>
> Your script seems quite complicated. Here's a simple one that produces a
> decent mesh:
>
> Merge "File_1.vtk";
> Merge "File_2.vtk";
> Merge "File_3.vtk";
> Merge "File_4.vtk";
> Merge "File_5.vtk";
> Merge "File_6.vtk";
> Merge "File_7.vtk";
>
> Coherence Mesh; // remove duplicate mesh nodes
>
> ClassifySurfaces{21 * Pi/180, 1, 0 /* or 1 */, 40 * Pi / 180};
> CreateGeometry;
>
> Mesh.CharacteristicLengthMax = 10;
> Mesh.CharacteristicLengthMin = 0.1;
> Mesh.CharacteristicLengthFromCurvature = 1;
> Mesh.MinimumElementsPerTwoPi = 20;
>
> s() = Surface{:};
> Surface Loop(1) = s();
> Volume(1) = 1;
>
> We still need to add some tools to automate the identification of
> curves/surfaces created by ClassifySurfaces. For now you'll need to tag
> them manually (or use some geometrical tests, e.g. using the Gmsh API).
>
> Christophe
>
>
>
>
> On 22 Jun 2020, at 17:25, Lisa Pankewitz <lisa at simula.no> wrote:
>
> To whom it may concern,
>
> I am trying to remesh a geometry based on .vtk files.
> I merge 7 .vtk files. 4 vtk files are used to create a surface that
> consists of 4 compounds. All 7 surfaces together define the volume. I
> assign tags (names) to the physical surfaces, which I need in later steps.
> Unfortunately, I realized the surface does not remesh. I checked several
> tutorials and parameters but could not yet find a possibility to keep the
> tags and remesh the surface and the volume in the assigned characteristic
> length in gmsh version 4.
> I tried
> '''
> RefineMesh
> '''
> but this only splits the elements instead of performing an optimal
> refinement.
>
> Do you by chance know what I could assign in order to remesh the surface
> AND the volume and not only the volume?
>
> Thanks so much for your time and have a wonderful day!
> Kind regards,
>
> Lisa
>
>
> ----------------------------------------------------------------------------------------------------------------------
> Lisa Pankewitz
> PhD student
> Simula Research Laboratory
> Martin Linges vei 25
> 1364 Fornebu
> Office 327
> lisa at simula.no
>
> <File_4.vtk><File_3.vtk><File_2.vtk><complex.geo><File_1.vtk><File_5.vtk>
> <File_6.vtk><File_7.vtk>_______________________________________________
> gmsh mailing list
> gmsh at onelab.info
> http://onelab.info/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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