Multiple voxels in one input

Geometry and Materials
1

Dear experts,

  1. Is it possible to use two voxel phantom geometries in same fluka input? There is no separate naming option that can be associated with VOXELS card.

  2. Instead, if I use the mesh phantom, I could set names for two UMESH files (by duplicating the .ele, .node etc file to get two adult male geometry). In this case, while using the ASSINMAT card, it will be wrong to use Reg and to Reg (to assign same material in the similar regions of two voxels), since there are other regions between these two regions in the complete drop-down region naming list. Is it correct? Or, it won’t be a problem for mesh geometry?

Similarly for USRBIN, I can use the attached settings, without worrying about the region naming sequence in the list. Is it correct?

Regards,

Riya

VOXEL:

image
image712×291 34.4 KB

UMESH:

image
image703×376 34.7 KB

ASSIGNMAT:

image
image675×165 24.9 KB

image
image653×159 24.1 KB

2

Dear Riya,

  1. It is not possible to have more than one VOXEL geometry in a FLUKA simulation.

  2. Using the Reg … to Reg options is wrong here. The order regions of an UMESH are continuous; thus, it is necessary to use separate ASSIGNMA cards for the UMESHes. Using material assignment of a range of regions within an UMESH is still OK.

    For region-based USRBIN scorings, you can have a range over multiple UMESHes. In that case, you will get results for the regions between those meshed.

    You can quickly check the order of regions in the .out file.

Cheers,
David

3

Dear @horvathd ,

Thank you for the explanation.

Regards,

Riya