Case6 Spatial grid group (defined via mesh)

 

The data files for the project are in directory: SpatVar_001\Exercises\Case 6\Data. Look for ! TODO  text in the datafile and follow the instructions.

 

In this exercise a grid defined via a mesh topology will be used to prescribe Porosity and Volumetric Plastic Strain values. For that purpose the data structure Spatial_grid_group (grid defined via a mesh at group basis) will be used and assigned to the spatial grid.

The model geometry is the equivalent 2D version of Case1 model (currently Spatial_grid_group is limited to 2D). To perform this exercise modify the data as shown bellow. Grid data can be copied from excel file "SpatVar_001_case6.xlsx" .

 

 

Spatial_grid

Data File

 

 

* Spatial_grid    NUM=1

! ----------------------------------------

 Name        "Porosity_Spatial"

 Type                   "Group"

 Groups              IDM=1

   "formation0"

 Element_variables   IDM=2

   "Porosity"  

  "P_strnv"

 

1Type is set to "Group" where

2Groups to which values are going to be assigned by the grid are specified (compulsory). In addition this is used to assign the Spatial_grid_group(s) which must be named as the groups to which they are assigned. In this case this grid will assign values to group "formation0" via a Spatial_grid_group named "formation0"

3Element variables Porosity and Volumetric Plastic Strain will be defined via the spatial grid.

 

 

Spatial_grid_group

Data File

 

 

* Spatial_grid_group    NUM=1

! ----------------------------------------

 Name                "formation0"

 Grid_name     "Porosity_spatial"

 Element_type             "TRIA3"

 Element_variables   IDM=2

   "Porosity"  

  "P_strnv"

 Topology                         IDM=3   JDM=916

  42   43   83

  81   82   84

     .

     .

     .

  255  211  244

 Node_numbers                     IDM=500

   1    2    3    4    5    6    7    8    9   10

  11   12   13   14   15   16   17   18   19   20

     .

     .

     .

  491  492  493  494  495  496  497  498  499  500

 Coordinates                      IDM=2  JDM=500

   0.00000        0.00000    

   8000.00        0.00000    

     .

     .

     .

   7322.11        3505.36    

 Element_values                   IDM=2  JDM=916

  0.339041      -0.229980    

  0.535973E-01  -0.552517    

     .

     .

     .

  0.986230E-01  -0.517947  

 

1Name is set to "formation0" (compulsory as it is the ParaGeo group name to which values will be assigned).

2Spatial_grid_group is assigned to grid "Porosity_spatial" via Grid_name

3Element type is set to "TRIA3" (triangular elements defined by 3 nodes.

1Element variables Porosity and Volumetric Plastic Strain will be defined in this Spatial_grid_group.

2Mesh topology is defined via specification of the 3 node numbers that form each element. Note that element numbers will be assumed to be in the same order as defined in the topology (first row will be element number 1).

3Node numbers are specified.

4Node coordinates for each node are specified.

5Element values for Porosity and Volumetric Plastic Strain are specified (in the same order as specified in topology).

 

Results

The result files for the project are in directory: SpatVar_001\Case6\Results.

 

 

SpatVar_001_Case6_Results

Porosity distribution after assignment of grid data.