Voronoi tessellation

[sidharthsarmah]

Hi @GiudGiud ,

I want to create a voronoi tessellation of a steel sample and perform diffusion modelling. It has different types of grains and grain boundaries, I dont find lot of text related to VT in MOOSE, can you please suggest.

[GiudGiud]

Hello

There are plenty of options. See the PropertyReadFile to be able to load data using a voronoi distribution. Then once this data is in a FUnction you can use it to assign subdomains, (through FunctionAux + CoupledVarSubdomainModifier), to assign material properties (using the same PropertyReadFile) etc

[sidharthsarmah]

Thanks @GiudGiud , I reworked on the problem and its a diffusion problem, having different values of diffusivity in different regions, is this correct now?

[[Kernels]

  [./cL_grad]
    type = ADMatDiffusion
    variable = 'cL'
    diffusivity = 'DL'
  [../]

  [./cL_time]
    type = ADHeatConductionTimeDerivative
    variable = 'cL'
    specific_heat = '1'
    density_name = '1'
  [../]

[]


[Materials]
  [./DGB]
    type = ADGenericConstantMaterial
    prop_names = 'DL'
    prop_values = '4.9875e-3' 
    block = 0
  [../]

  [./DL]
    type = ADGenericConstantMaterial
    prop_names = 'DL'
    prop_values = '4.9875e-6' 
    block = 1
  [../]
[]

[GiudGiud]

looks fine to me!

[sidharthsarmah]

Hi @GiudGiud , I want to do something like this: use CL in grain and 2*CL in grain boundary?

[GiudGiud]

you cannot use 2*CL as a variable.

You could create a new variable that is intended to be valued as '2*Cl" but I think it makes more sense to multiply your material properties by 2 to avoid having to do this, and keep a single 'CL' variable

[sidharthsarmah]

Thanks @GiudGiud