Help meshing hollow region
Help meshing hollow region
(OP)
So with the help of Mustaine3 I managed to create a merged solid geometry of a sphere encapsulated in a cube & maintained the inner boundary.
My problem is now that however I mesh it I keep getting a hollow sphere whereas, I am after the spheres surface partitioning the geometry not cutting it. The sphere & the cube are merged, its just that I cant select the spherical region to mesh just the outer region.


I was hoping that I could use this in the same way as a partition but so far no luck.
My problem is now that however I mesh it I keep getting a hollow sphere whereas, I am after the spheres surface partitioning the geometry not cutting it. The sphere & the cube are merged, its just that I cant select the spherical region to mesh just the outer region.


I was hoping that I could use this in the same way as a partition but so far no luck.





RE: Help meshing hollow region
RE: Help meshing hollow region
RE: Help meshing hollow region
With merge you keep the inner geometry, but you get separate cells for inner and outer regions.
With cut you remove the inner geometry and you have a hollow sphere.
RE: Help meshing hollow region
I've gone through it a number of times now, always the same result after meshing.
RE: Help meshing hollow region
RE: Help meshing hollow region
RE: Help meshing hollow region
RE: Help meshing hollow region
You just have to hide one cell and put the displayed elements into a set. Repeat that with the other cell. Then you'll have your two element sets.
RE: Help meshing hollow region
*********************************************************
Are you new to this forum? If so, please read these FAQs:
http://www.eng-tips.com/faqs.cfm?fid=376
http://www.eng-tips.com/faqs.cfm?fid=1083
RE: Help meshing hollow region
IceBreakerSours: I have been doing just that, this is why I have opened up the question here. I have tried a number of different approaches, seed part, seed edge, mesh part, mesh region..... but I still get the hollow sphere.
RE: Help meshing hollow region
I've tried to partitioning the volume in various ways & tried bottom up meshing but to no avail, I just cant seem to select the spherical region.
eg.
RE: Help meshing hollow region
You've just clicked on the outer cell to assign a tet mesh shape. The inner region is unseleted, so it should be a hex mesh, which is not possible for a ball and so not mesh is created.
Assign a tet mesh and select all cells by using a drag box.
RE: Help meshing hollow region
I much appreciate your help in all of this, do you prefer chocolates or flowers?
RE: Help meshing hollow region
RE: Help meshing hollow region
http://www.truegrid.com/QualityMesh.html
Scroll down and see Best Quality for 3D.
Take a look at the hex meshes in the link below:
http://www.truegrid.com/GalleryHome.html
*********************************************************
Are you new to this forum? If so, please read these FAQs:
http://www.eng-tips.com/faqs.cfm?fid=376
http://www.eng-tips.com/faqs.cfm?fid=1083
RE: Help meshing hollow region
1. Split the ball on his 3 global planes into 8 pieces. This should be structured meshable now (green).
2. Cut out a cylinder and then split everything once more. The two halfs of the cylinder are sweep meshable (yellow) along their axial direction. The outer region of the ball is sweep meshable along the circumference.