Ex_005 Case 2 Sedimentation with Layer Merge

This example shows how to use layer merge within Sedimentation_data. The Layer_merge_flag keyword when set to 1 indicates that at the end of deposition of the corresponding layer it will be merged with the previous one into a single group. This may be useful to avoid potential issues when very thin layers are deposited which may be later subjected to large strain.

 

 

The data file Ex_005_Case2.dat for the example is found in: ParaGeo Examples\General Examples\Ex_005\Data

 

 

Sedimentation_data

Data File

 

 

* Sedimentation_data

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

 Stratigraphy_unit_name    "Formation1"

 Sediment_horizon_name        "General"

 Material_name                "Elastic"

 Duration                           0.5

Layer_merge_flag                     1

 

 

* Control_data

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

 Control_title               "Form1"

 Factor_critical_time_step      0.7

 Solution_algorithm               1

 Maximum_number_time_steps      1E8

 Target_number_time_steps     10000

 Duration                       0.5

 Output_frequency_plotfile       -1

 Screen_message_frequency       500

 Output_time_plotfile           0.2

 

1.In Sedimentation_data the Layer_merge_flag keyword set to 1 defines that at the end of the current deposition step the deposited layer should be merged with the previous one into a single group.

 

 

 

Results

The result files for the project are in directory: ParaGeo Examples\General Examples\Ex_005\Results.

 

As can be seen on the figure below Formation1 is deposited in 3 increments. Note how in the fourth figure, when the 3rd sub-layer is being deposited, the 2nd and the 1st sub-layers are merged. Same procedure is performed for Formation 2 which is deposited in 2 increments.

 

Ex_005_Case1_01

Evolution of the column through its sedimentation. Colours indicate the different groups.