Generating mesh for a unit cell in MOOSE

[yfche]

The attached mesh is generated in cubit, which contains six 1/3 cylinders, a central hole, and a hexagon excluding the 1/3 cylinders. I wonder if this geometry can be directly generated and meshed in the MOOSE reactor module. Thanks.

[GiudGiud]

Hello

I think we can do this geometry.
Overall it will be:

• a hexagonconcentriccirclegenerator for the center with a big circle
• same generator for the 6 other positions
• an assembly generator to tie them all together
• an hexagon trimmer with the peripheral option to cut on the circles of the 6 external positions

Guillaume

[miaoyinb]

I found that adding "quad_center_elements = true" causes Segmentation fault: 11, as below. Setting it to false generates the mesh fine. Any ideas why setting the quad_center_elements crashes my code? Thanks.

[hex_1]
    type = PolygonConcentricCircleMeshGenerator
    num_sides = 6
    num_sectors_per_side = '10 10 10 10 10 10'
    # background_intervals = 10
    # background_block_ids = 20
    # background_block_names = background
    polygon_size = 3.0
    polygon_size_style = radius
    preserve_volumes = off # on
    flat_side_up = true
    quad_center_elements = true
  []

This should be a bug. I will fix it.
It should work fine if you uncomment # background_block_ids = 20 before the fix.

[miaoyinb]

#23652 Thanks for reporting the bug.

[yfche]

Uncommenting # background_block_ids = 20 works. Thanks for providing the workaround.

[miaoyinb]

The fix for the bug has been merged. Your original input should also work with the most updated MOOSE next branch.

[GiudGiud]

use the BlockDeletionGenerator