A solution control data structure must always be specified.  This data structure defines the solution algorithm, termination time, step control and output frequency data for screen, plot file and restart fields.  The specific keyword used is dependent on the analysis type or active fields with valid types being:

 

1Control_data - control data for the geomechanical field (and may include fluid flow control data for coupled simulations).

2Porous_flow_control_data - control data for the porous flow field.

3Thermal_control_data - control data for the thermal field.

 

If Porous_flow_control_data or Thermal_control_data are not specified, then the solution control will be based on the Control_data data structure.

 

In a coupled simulation more than one keyword may be specified in conjunction with Couple_control_data, which defines the active fields.

 

Once a control data keyword, or a group of keywords in a coupled problem is processed, ParaGeo processes this control step before reading any further data from the data file. Therefore the control data data structures define the different stages (steps) in the simulation.

 

Note that the mechanical time step size may be defined either in Control_data or in the data structure Time_scaling_factors which is also described in the reference manual pages within this folder.

 

 

 

Examples

 

All tutorial examples demonstrate usage of control data structures of some type as they are compulsory for the simulation.