Import a mesh with generated grain structure

[Kirill Romanov]

We are developing crystal plasticity material models in a team and we want to embed our models in deal.ii. So I have a question – are there any simple tools to import a mesh (we use a simplex mesh) with generated grain structure into deal.ii (e.g. from Neper)? I have not been able to find a ready-made function. Can you please suggest options to solve my problem. So far I see one option is to write the mesh reading myself using the example of existing functions (e.g. GridIn::read_msh()) with assigning material_id to cells belonging to a particular grain.

[Wolfgang Bangerth]

On 10/14/24 07:55, Kirill Romanov wrote:
> **

Kirill,
deal.II can read mesh files in many different formats through the functions in
namespace GridIn. step-5 and step-49 are examples.

So in your case, the question is simply in which format you have the mesh.
Chances are that you can export whatever mesh you have in a format that
deal.II can read. I don't know Neper -- what formats can it export?

Best
Wolfgang

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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/

[Kirill Romanov]

In Neper you can output the mesh in different formats (like .msh, .inp and others) and now I have a mesh in .msh format. My main question is, how can I use deal.ii to read a simplex mesh where each element belongs to a certain grain? I want to read the mesh as in the image, and assign different properties to elements in different grains.

вт, 15 окт. 2024 г. в 07:52, Wolfgang Bangerth <bang...@colostate.edu>:

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[Praveen C]

I think you can get this with

https://dealii.org/current/doxygen/deal.II/structCellData.html

https://dealii.org/current/doxygen/deal.II/classCellAccessor.html#ae4769702cd7ab67a61b25778ea3021b2

cell->material_id()

This should give the physical tag you have set to each cell in your gmsh grid.

https://dealii.org/current/doxygen/deal.II/classGridIn.html#a6a87000a17a31132729c23656ada559b

best

praveen

[Kirill Romanov]

Thanks for the answers! I've been thinking about solving my question along roughly the same lines.

вт, 15 окт. 2024 г. в 18:11, Praveen C <pra...@math.tifrbng.res.in>:

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