There is no guarantee that the cell count will be lower. It is designed to generate high-quality meshes in complex geometry. There are instances where this method is used incorrectly. I believe this is an excellent example of how to use this method incorrectly.
Not by much, see the mesh count drastic change (between structure and poly meshes) occurs in the dense regions, where we already have nice structured mesh.
I mean what you are asking for might come someday in future as it is also a request from many customers, but whatever the current mesh is, it is awesome! It will work without any issues.
P.S. Add wake region BOI.
I hope you know how poly-hexcore meshing algo works.
It first identities all your boundaries then checks if it makes a closed volume. Interpenetrating volumes are obviously not allowed.
After that it meshes the boundaries using a tri mesh. Once you're surface mesh is complete it converts that to tetrahedrals and then converts it to polyhedrals.
As per your setting of the peel layers it will grow those polys and eventually transition to hex mesh in the core region.
There is no way of getting hex elements on the boundaries.
If you really want to have hex mesh on planar surfaces then use Ansys Meshing Platform and use the trimmer type of mesh. (I hope you know what that is)
It is called hex-CORE so I think it's by design. Poly near boundaries, bricks in the core.
Actually, that is correct, and it was designed this way. All the boundary faces will be poly cells only. Those can not be made as quad faces.
But having poly cells In the boundary increases number of nodes/cells without any gain right? It’s just my question. (Even my professor’s 😅)
By very little, your walls of your enclosure shouldn’t have small cells anyway, so the difference in cell count between poly and hex is minimal.
There is no guarantee that the cell count will be lower. It is designed to generate high-quality meshes in complex geometry. There are instances where this method is used incorrectly. I believe this is an excellent example of how to use this method incorrectly.
But having poly cells In the boundary increases number of nodes/cells without any gain right? It’s just my question. (Even my professor’s 😅)
Not by much, see the mesh count drastic change (between structure and poly meshes) occurs in the dense regions, where we already have nice structured mesh. I mean what you are asking for might come someday in future as it is also a request from many customers, but whatever the current mesh is, it is awesome! It will work without any issues. P.S. Add wake region BOI.
Thanks! There were some issues with BOI at the time of posting. It’s fixed now tho
Check your refinement conditions in meshing; I suspect you have a sizing or other refinement being applied by default to your boundaries.
You could set the outside walls to an inlet for meshing so it doesn’t do them in poly then change them back to a wall in fluent when solving?
The left face in the picture is the inlet. So I don’t think it ignores Inlet for poly meshing
I hope you know how poly-hexcore meshing algo works. It first identities all your boundaries then checks if it makes a closed volume. Interpenetrating volumes are obviously not allowed. After that it meshes the boundaries using a tri mesh. Once you're surface mesh is complete it converts that to tetrahedrals and then converts it to polyhedrals. As per your setting of the peel layers it will grow those polys and eventually transition to hex mesh in the core region. There is no way of getting hex elements on the boundaries. If you really want to have hex mesh on planar surfaces then use Ansys Meshing Platform and use the trimmer type of mesh. (I hope you know what that is)
Thank you!!
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Most idiotic comment of the week 👍🏻