The finite elements in ParaGeo are organized in Groups. A Group in ParaGeo is a set of elements which are defined with common properties and share common data assignments. In geological models, usually, each stratigraphy unit is a different group. If a stratigraphy unit is represented by a discontinuous geometry (e.g. a stratigraphy unit which has been pierced by a salt diapir) is usually represented by a single group.
Groups in ParaGeo are usually identified by their corresponding ID number and a defined name. Such ID's will be used to specify data assignments (e.g. material data, adaptive remeshing properties, etc).
Group data is defined through:
1.Group_data - which defines the data relevant to a specific group (e.g. element type, porous flow type, geometry entity assignment, etc)
2.Group_control_data - which defines which groups and which fields for each group are going to be active during the simulation
Examples
All tutorial examples demonstrate usage of group data as at least one Group_data data structure is compulsory to run a ParaGeo simulation.