[rajan19us]

Dear users and experts,

I have tried searching the answer for this question online, but I found mostly the definitions, concepts and permitted values of various measures of mesh quality.
But, I really want to know how can the mesh quality be improved?

For example, I observe that after refinement, near that particular edge, I am getting bad mesh quality (say aspect ratio). What kind of structural changes/measures should I incorporate in the mesh to improve the Asp. ratio near that edge??

Any lead on this topic will be helpful. Thank you.

[Gweher]

Hello,

Well, I can say that it's generally model dependent. You can refine your mesh in areas of interest through various option (local point / edge refinement - growth ratio - element size functions - etc).

If you want to improve the quality of your mesh you need to put some "efforts" helping the meshing tool to discretize your geometry.

Don't forget "an image speaks a thousand words" so if you want more feedback, it may be easier to explain your problem with some images

[rajan19us]

Thank you @Gweher for prompt reply. Please take a look at the attached image. I tried changing the growth rate and max&min size of the mesh and could successfully bring the aspect ratio from 3.1 to 2.36. Now, I have traced these bad elements and featured them in this screenshot.
Now, what am I supposed to do to cure these tetrahedrons?

Regards,
Rajan

[Gweher]

Hi Rajan,

You can either use a local mesh refine control on the problematic edge or start partitioning your geometry into smaller parts to help the mesher. For instance you can split your geometry using the parallel splitting plane (see picture) so you’ll end up with a “smaller” part containing your problematic elements. You can create hexa elements of higher quality if you invest a bit of time to partition your geometry (you should have a look at how to partition a part/model in FEA).



Have fun

[rajan19us]

Thanks. That answer was indeed helpful.

Do you mean that I should mesh the partitioned geomtry separately i.e. there will be 2 meshes created. One for the problematic part and the other for the remaining big solid. In this case, how should the mesh be stitched to each other at the end?

[rajan19us]

I got it @Gweher. Thanks

[Gweher]

Great, you can still continue to partition further your geometry to create a better mesh.

Have fun