Step03 Hex to Tet conversion

 

In the present workflow step the Hex meshed geometry will be converted to a Tet converted geometry. The data files are found in Geol_003\Case01\Step03_Hex_2_Tet\Data. It consists of:

 

1.Geol_003_Case01_Step02_geom_hex.geo previously generated

 

2.Geol_003_Case01_Step03_geom_hex.geometry which is an edited version of the Geol_003_Case01_Step02_geom_hex.geometry file generated in the previous workflow step. Here we have manually edited the group numbers so they are numbered starting from the oldest formation (formation01) to the youngest one (formation10). This is done for convenience so that the group numbering in restoration and forward simulation is consistent. Also a material name must be defined within each Group_data structure.

 

3.Geol_003_Case01_Step03_Hex_2_Tet.dat datafile defined to perform the Hex to Tet conversion.

 

 

Geol_003_Case01_Step03_Hex_2_Tet.dat

 

Here the file for conversion from a hex to tet meshed geometry is described.

 

Data File

 

* Geometry_data

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

 File_name   Geol_003_Case01_Step02_geom_hex.geo

 File_format                    hdf

 

* Include

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

 Filename Geol_003_Case01_Step03_geom_hex.geometry

 

 

 

* Mesh_generation_variables

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

 Node_insert_perturb_fact  0.1

 

* Mesh_control_data

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

 Generation_algorithm    2                        

 Mesh_generation_flag    0                        

 

* Unstructured_mesh_data

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

 Default_element_size        400

 Element_size_bounds IDM=2

  /Max. Element Size/      400

  /Min. Element Size/      250

 

 

 

* Util_convert_hex2tet_mesh

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

 File_name     Geol_003_Case01_Step03_geom_tet

 

 

1.Geometry_data is used to read the .geo file generated during the previous workflow step

 

2.An Include data is used to read the edited .geometry file containing group data and geometry set data

 

3.Mesh data for an unstructured mesh is defined:

a.Mesh_generation_variables with Node_insert_perturb_fact 0.1 to make the generated mesh "less regular"

b.Mesh_control_data  with Generation_algorithm set to 2 (unstructured mesh)

c.Unstructured_mesh_data with the element size defined conveniently

 

4.Util_convert_hex2tet_mesh is defined in order to convert the Hex mesh to a Tet mesh using the defined mesh generation data and outputting the new Tet mesh into the specified datafile.

 

 

Results

 

The results for the present workflow steps are provided in Geol_003\Case01\Step03_Hex_2_Tet\Results

 

The key generated results comprise:

 

1.Geol_003_Case01_Step03_geom_tet.geo file containing the geometry and tet mesh.

 

2.Geol_003_Case01_Step03_geom_tet.geometry file containing the group and geometry set data

 

 

Geol_003_Case01_Fig02

View of the geometry meshed with HEX (left) and TET (right) elements