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, which 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.

  • pylithapp.problem.fault Fault parameters common among the simulations in this directory.

  • pylithapp.problem.bc Boundary condition parameters common aomong the simulations in this directory.

These quasistatic simulations solve the elasticity equation and include a fault, so we have a solution field with both displacement and Lagrange multiplier subfields. We specify a basis order of 1 for each of the subfields, corresponding to the default value.

We use the same 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. Similarly, we set the fault parameters and boundary condition information common to all simulations in the directory.