Common Information

In addition to the finite-element mesh, PyLith requires files to specify the simulation parameters. We specify parameters common to all simulations in a directory in pylithapp.cfg. The pylithapp.cfg file contains numerous comments, so we only summarize the parameters here.

The settings contained in pylithapp.cfg for this problem consist of:

• pylithapp.metadata Metadata common to all of the simulations in the directory.

• pylithapp.journal.info Parameters that control the verbosity of the output written to stdout for the different components.

• pylithapp.mesh_generator Parameters for importing the finite-element mesh.

• pylithapp.problem Parameters that define the boundary value problem and it solution, such as the type of solver, solution fields.

• pylithapp.problem.materials Paramters that specify the governing equation and bulk rheologies.

These quasistatic simulations solve the poroelasticity equation, so we have a solution field with displacement, pressure, and volumetric strain subfields. We specify a basis order of 2 for the displacement subfield, and 1 for each of the remaining subfields.

We use the material properties in all of the simulations in this directory, so we specify them in pylithapp.cfg to avoid repeating the information in the file with parameters for each simulation.