Be careful about SnappyHexMesh. You can use it to make hex-only meshes, but
it will generate a tesselated mesh (which does not really conform to the
boundary, it is by all means a voxel mesh).
If you fully use Snappy, it will generate a polyhedral mesh with as many as
20 faces per element. This
Oh, and and just in case you’ve not heard of it before and it might be useful,
there’s also this tool that does automated hex meshing:
https://www.openfoam.com/documentation/guides/latest/doc/guide-meshing-snappyhexmesh.html
Since you have access to Cubit/Trellis, “that patch” is probably not necessary.
Cubit uses the Mesquite library for mesh quality improvement, so if you could
try to increase the mesh quality that way. Although I’d have to agree with
Wolfgang that it might not help too much in this case, but
On 9/25/20 4:58 AM, Paras Kumar wrote:
In the quest of alternative solutions, I came across the Mesquite library and
was curious to know if that could be helpful to improve the quality of the
Delaunay based Hex mesh so as to avoid the issue with stress irregularities.
It also seems that
Dear Prof. Bangerth,
Thank you for the appreciation.
In the quest of alternative solutions, I came across the Mesquite library
and was curious to know if that could be helpful to improve the quality of
the Delaunay based Hex mesh so as to avoid the issue with stress
irregularities.
It also
I am coming late to the conversation (and I only looked at it quickly,
sorry), but I have two additional suggestions:
1. Depending on the deformation of cells and the PDE in question, it
might be important to check if the quadrature degree is high enough to
not contribute to the overall error.
On 9/22/20 4:27 PM, Wolfgang Bangerth wrote:
I wished every student project were as comprehensively explored! :-)
I tacitly assumed that Maurice Rohracker is your student. I didn't mean to
imply that the work you're doing is at the "student level" -- quite the
contrary: What your reports
On 9/22/20 11:09 AM, Paras Kumar wrote:
In order to verify if the "improper" modeling of the curved particle surface
due to the reason you explained above, is the cause for this irregularities,
we tried with a cubic particle, thereby eliminating the above issue, but still
observe
On 9/22/20 10:41 AM, Paras Kumar wrote:
As can be seen in figures 7 & 8 of the attached report, a further refinement
results in relatively smoother contours, but the irregularities are still not
eliminated.
OK, that's good to know at least as a check that your program is doing
something
On 9/9/20 12:31 PM, Paras Kumar wrote:
This does not say anything about the *absolute level of accuracy*. I would
not
be surprised if for a mesh like the one you show (in which pretty much every
hexahedron is poorly shaped), the solution is less than for the
corresponding
Dear Paras,
I have faced a lot of similar issues in the past and maybe these
suggestions can help (or maybe not).
1. Generally visual rendering software (at least paraview) renders data on
quad/hex meshes using triangular polygons. Consequently, when you look at
the color map within a square,
Paras,
I am working on homogenization of particulate nano-composites and thus have to
solve the finite deformation quasistatics problem on different
microstructures, such as one shown in the attachment pic-1.png.
In order to automate the generation of (2D & 3D) meshes for microstructures
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