Dear Mr. Rohracker,
If I understand correctly your issue, you want to generate meshes of disks with
at least 4 elements along the radial direction, from the center to the edge of
the disks. There are two ways you could use to control the mesh size inside the
disk and enforce your constraint:
1. The easiest method is to use a Point { id } In Surface { id } ;
statement (explained
here<http://gmsh.info/doc/texinfo/gmsh.html#Miscellaneous-mesh-commands> in the
documentation). You can use this statement to insert the center point of the
circle inside the mesh of the disk. If you set different mesh size for the
center point and for the points on the disk edge, then you will have a radial
gradient in mesh element sizes.
2. If you want to have more control on the distribution of the mesh size,
you might want to use fields (explained
here<http://gmsh.info/doc/texinfo/gmsh.html#Specifying-mesh-element-sizes> in
the documentation). Fields are more tricky to setup but I am more certain that
they can help you to have always exactly 4 elements along the disk radius. Have
a look at Gmsh tutorial
n°10<http://gmsh.info/doc/texinfo/gmsh.html#t10_002egeo> for an example on how
to setup fields.
Let me know if this helped or if you have other questions.
Sincerely Yours,
Guillaume Dilasser
-----Message d'origine-----
De : gmsh <[email protected]> De la part de Rohracker,
Maurice
Envoyé : vendredi 3 janvier 2020 14:52
À : [email protected]
Objet : [Gmsh] Meshing constraint in interphase section of RVEs
Dear GMSH mail list members,
for a HiWi project at the University Erlangen-Nürnberg, I use GMSH for meshing
representing volume elements (RVEs) with interphase sections.
For these interphase sections, we want at least 4 elements between the
particles and the interphase.
For some elements, we get the right results because of small mesh size.
But for others not. Is there any possibility to get the right results without
decreasing the mesh size of the circles?
I also tried to put an additional point between interphase and particle to
specify here a kind of helping mesh size.
Is there also a possibility to have inside the circular elements larger mesh
sizes, so that the mesh isn't that fine at all at the centre of each inclusion?
(e.g. by specifying a larger mesh size at the centre?)
You find attached the current generated mesh.
Thank you very much in advance.
Best regards,
Maurice Rohracker
Master Student Computational Engineering FAU Erlangen-Nürnberg
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