> On 10 Dec 2020, at 14:34, Hossam Ragheb <har1...@soton.ac.uk> wrote:
>
> Hi,
>
> I am new to gmsh, so apologies if the answer to my question is obvious.
>
> I coded a .geo file (Attached) to create 3D RVE with fibers in a matrix that
> includes voids.
>
> The process simply is :
>
> 1- Create box of the matrix material.
>
> 2- Create voids using Sphere command and BooleanDifference to remove
> these from the matrix material.
>
> 3- Create fibers as Cylinders and and utilise BooleanFragments to include
> the cylinders in the matrix.
>
> I have one persistent problem, once the mesh is created the fibers are meshed
> as hollow cylinders, however i need them to be solid.
>
> Its interesting behavior. Last thing to note that mesh size affects the
> outcome, for example when the min/max mesh size is 2, the result is solid
> cylinders, but with mesh size of 1, it becomes hollow.
>
> It there a way to force the meshing algorithm to mesh the cylinder as solid
> object?
>
> I have attached the .geo file, please let me know if you can help.
>
> Any suggestions?
The geometry is a bit tricky: it's almost degenerate (with some cylinders very
close to the boundary), and the parametrization of some curves does not seem
monotonic. I've successfully meshed with the following parameters:
MeshSize{305, 310} = 0.5;
Mesh.MeshSizeMax = 2; // successfully tested with 1 and 2
Mesh.AngleToleranceFacetOverlap = 1e-6;
Mesh.Algorithm3D = 10;
Christophe
>
> Thanks,
>
> Hossam Ragheb
>
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—
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://people.montefiore.ulg.ac.be/geuzaine
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