Hello my friends. I’m trying to generate 3D structured mesh for the following model. I want to first generate 2D quads and then generate hexs by sweeping. The surfaces includes many squares.
Ideally, I hope to generate mapping-like quads, as shown bellow:
Hi @WayneYY,
from what i see you could use the submap scheme on the top surface and then sweep from top to bottom.
Can you share the geometry?
You could probably do it. But i would be easier to just use webcuts to decompose the volumes into a lot of cubes and mesh them with a big enough size to get 1 element per cube.
Sure Hofbauer, here’s the cubit file and asic geometry
model1_2x2.cub5 (785.5 KB)
model1_2x2.sat (374.3 KB)
Submap works, but the elements at corner have low quality. Can I customize the location of each ndoe, or there’s better meshing strategy?
Yes you could move the location of a node with
Or split the curves to get a vertex that will then be meshed.
The fastest way would be to just decompose the geometry using webcuts and then imprint, merge and mesh the volumes.
reset
open "model1_2x2.cub5"
reset vol all
webcut volume all with sheet extended from surface 126
webcut volume all with sheet extended from surface 125
webcut volume all with sheet extended from surface 124
webcut volume all with sheet extended from surface 123
webcut volume all with sheet extended from surface 90
webcut volume all with sheet extended from surface 91
webcut volume all with sheet extended from surface 92
webcut volume all with sheet extended from surface 93
webcut volume all with sheet extended from surface 305
webcut volume all with sheet extended from surface 777
webcut volume all with sheet extended from surface 531
webcut volume all with sheet extended from surface 1126
webcut volume all with sheet extended from surface 713
webcut volume all with sheet extended from surface 461
webcut volume all with sheet extended from surface 203
webcut volume all with sheet extended from surface 932
vol all size 0.01
imprint vol all
merge vol all
mesh vol all
These techniques are helpful, thank you Hofbauer.
How can I merge the decomposed volumes once I generate the mesh?
I got following errors with Boolean Operation->Unite, but I’m sure all volumes are imprint&merged:
If you want them in a block for export you could do that with
block 1 add vol all
If you want the starting volumes in a extra block. You could put them before decompsing in a block. This way all new volumes will get assigned to the block of the cutted volumes.
#!cubit
reset
open "//10.0.0.137/_hmb_coreform/Support/202412/model1_2x2.cub5"
#!python
ids = cubit.parse_cubit_list("volume","all")
for i in range(len(ids)):
status = cubit.cmd(f"block {i+1} add volume {ids[i]}")
#!cubit
reset vol all
webcut volume all with sheet extended from surface 126
webcut volume all with sheet extended from surface 125
webcut volume all with sheet extended from surface 124
webcut volume all with sheet extended from surface 123
webcut volume all with sheet extended from surface 90
webcut volume all with sheet extended from surface 91
webcut volume all with sheet extended from surface 92
webcut volume all with sheet extended from surface 93
webcut volume all with sheet extended from surface 305
webcut volume all with sheet extended from surface 777
webcut volume all with sheet extended from surface 531
webcut volume all with sheet extended from surface 1126
webcut volume all with sheet extended from surface 713
webcut volume all with sheet extended from surface 461
webcut volume all with sheet extended from surface 203
webcut volume all with sheet extended from surface 932
vol all size 0.01
imprint vol all
merge vol all
mesh vol all
draw block all
To get one single volume you could use
unite vol all include_mesh
Got it! Thank you again 
.
